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Zucchini Lasagna

5 from 9 votes

posted: 08/08/21

This post may contain affiliate links. Please read my disclosure policy
This post may contain affiliate links. Please read my disclosure policy

Zucchini Lasagna is a delicious way to make a low carb dinner. In this version we are also making it vegetarian while still loading it with incredible flavor. With our tried ant true method, you won’t end up with watery zucchini lasagna!

a close up of a piece of zucchini lasagna on white plates topped with freshly chopped parsley

One request I’ve been getting from readers lately is for more vegetarian recipes. I grew up vegetarian, so I have a wealth of recipes that will be headed your way here and there. Even if you aren’t a dedicated vegetarian, adding a vegetarian meal to your menu once or twice a month can be great for your diet!

The first up on the list is this delicious Zucchini Lasagna. What I love about this recipe is that even though we are taking out traditional noodles and meat, we aren’t losing any flavor! This recipe is full of vegetables and loaded with seasonings that will make your heart sing.


I’ve tried many veggie lasagna recipes and this is my new favorite!

How to Make Zucchini Lasagna

This recipe has a few steps to it, but it can either be made the night before or it can be frozen and baked at a later date. I promise it is well worth the effort.

You’ll notice that I often say, “while this is happening, do this.” This recipe goes faster if you multi-task. Make sure that you see the recipe card at the bottom of the post for all of the measurements and the full printable instructions.

  1. Roast zucchini slices: This recipe starts by roasting thinly sliced zucchini we’ve seasoned with salt and pepper. Doing this gets rid of a lot of extra moisture, making it a key step.
  2. Prepare the sauce: While the zucchini is roasting, sauté vegetables to make the sauce. Once they are soft add in the tomato sauce, tomato paste, basil and oregano.
  3. Make the ricotta mixture: While the vegetables are sautéing, mix together the ricotta cheese, egg, and fresh parsley.
  4. Assemble the lasagna: Start with half the sauce, then add zucchini, then half of the ricotta mixture, and top that with all of the spinach. Top all of that with half of the mozzarella. Repeat all of this with the remaining sauce, zucchini, ricotta mixture, and finally the rest of the mozzarella and some Parmesan cheese.
  5. Bake: Put the lasagna in the oven covered for 30 minutes and then uncovered for 15 minutes.

Roasting Zucchini

As mentioned above, we start this recipe by roasting the zucchini. It isn’t that the zucchini needs to be softened before it goes in the lasagna.

The reason we roast the zucchini first is because it is so full of moisture. That is great in recipes like my Zucchini Muffins. But in a casserole it can literally bring pools of water to the dish.

Roasting first, especially when you first season with salt, can take care of that problem. I suggest that you even pat the zucchini down after roasting if you see puddles.

Shredding Cheese

I strongly encourage you to shred your own cheese for this recipe, as opposed to buying pre shredded cheese. Cheese that has been shredded right from the block in your kitchen will always melt better than a bag of pre shredded cheese. In some recipes it may make the difference in how much your family likes a recipe.

Using Meat in Zucchini Lasagna

This recipe does work with meat. If you want to add meat to this recipe, you will need to:

  1. Remove the bell peppers and carrot from the recipe.
  2. Use either ground beef or ground turkey. If you are using ground beef, you can remove the olive oil from this recipe and then sauté the onion and garlic with it, draining the fat from the pan before adding the tomato sauce.

All of this is done during step four of the recipe as written below.

side view of low carb vegetable lasagna recipe

Making Zucchini Lasagna the Day Before

This great vegetable lasagna can be made ahead of time. Just make it up until you would put it in the oven. Wrap it and put it in the refrigerator. Pull it out and bake when you are read to serve it.

Freezing Zucchini Noodle Lasagna

This recipe can also be made in advance and frozen. I suggest making this in a disposable casserole dish so you can take it right from your freezer and put it into your oven without worrying about your dish breaking.

Make the recipe up to the point of baking. Wrap it three times with plastic wrap or aluminum foil. Freeze up to three months. When ready to bake, remove the wrapping and just cover it with a single layer of aluminum foil. Bake it at 350 degrees for 45 minutes covered and then 15 minutes uncovered.

overhead view of a pan of zucchini lasagna recipe


Do I need a mandolin to cut the zucchini?

I do not think that is necessary. In fact, having them a little bit thicker adds more structure to the lasagna.

Do I need to boil the zucchini (like noodles) first?

No, but I do recommend roasting them to remove excess water.

Is this recipe gluten free?

Yes! You can make this recipe exactly as w

Can I add meat to this recipe?

Absolutely. Please refer to the section above entitled Using Meat.

Can I make this recipe ahead and freeze it?

Yes, both work with this recipe. Please refer to the section above entitled Making Zucchini Lasagna the Day Before.

Other Vegetarian Dinners

If you are looking for other great vegetarian options, here are some of my favorites.

  • Broccoli Pasta: Made in just 25 minutes, this is a personal favorite of mine.
  • Black Bean Tacos: I absolutely love this recipe. It is full of flavor and so simple to make.
  • Greek Quinoa Salad: This is great to make on a Sunday and take it to work throughout the week!

If you make any of these delicious recipes or my Zucchini Lasagna recipe, please leave me a comment and let me know what you think!

a close up of a piece of zucchini lasagna on white plates topped with freshly chopped parsley
5 from 9 votes

Zucchini Lasagna

Serves: 6 people
(tap # to scale)
Prep: 30 minutes
Cook: 45 minutes
Total: 1 hour 15 minutes
Zucchini Lasagna is a delicious way to make a low carb dinner. In this version we are also making it vegetarian while still loading it with incredible flavor.


  • 3 medium zucchini sliced into thin pieces
  • 1 tablespoon salt
  • 1 teaspoons black pepper
  • 2 tablespoons olive oil
  • 2 garlic cloves minced
  • 1 green bell pepper diced fine
  • 1 red bell pepper diced fine
  • 1 carrot diced fine
  • 1 onion diced
  • 6 ounces tomato paste
  • 15 ounces tomato sauce
  • 1 tablespoon dried basil
  • 1/2 tablespoon dried oregano
  • 1 egg
  • 15 ounces low fat ricotta cheese
  • 2 tablespoons fresh parsley minced
  • 10 ounces frozen spinach thawed and fully squeezed of all the water
  • 8 ounces mozzarella cheese shredded
  • 1/2 cup Parmesan cheese shredded


  • Preheat your oven 425 degrees. Spray a 9 by 13 inch baking sheet with cooking spray and set aside.
  • Line a rimmed baking sheet with parchment paper. Add the zucchini slices and top with salt and pepper on both sides.
  • Bake the zucchini for 5 minutes. Flip and bake for 5 more minutes. If any pools of water remain after baking, use a paper towel to blot them away.
  • Lower the oven temperature to 350 degrees.
  • While the zucchini is baking, prepare the sauce. Heat the olive oil in a large skillet. Add in the onion, carrot, garlic, and bell peppers. Cook until the vegetables are soft.
  • While the vegetables are sauteing, stir together the egg, ricotta, and parsley. Set aside.
  • Stir the tomato sauce, tomato paste, basil, and oregano into the vegetables. The sauce will be thick.
  • To assemble pour half of the sauce in the bottom of the baking dish. Layer in half of the zucchini. Add half of the ricotta mixture and then all of the spinach. Top that with half of the mozzarella. Add the remaining sauce, then remaining zucchini slices, followed by the reamaining ricotta mixture and what is left of the mozzarella. Top with the Parmesan cheese.
  • Cover with foil and bake for 30 minutes. Uncover and bake for an additional 15 minutes. Let stand for 5 minutes before slicing and serving.
Serving: 1slice Calories: 359kcal (18%) Carbohydrates: 27g (9%) Protein: 26g (52%) Fat: 18g (28%) Saturated Fat: 4g (25%) Polyunsaturated Fat: 1g Monounsaturated Fat: 5g Cholesterol: 56mg (19%) Sodium: 1948mg (85%) Potassium: 829mg (24%) Fiber: 6g (25%) Sugar: 14g (16%)
Author: Lisa Longley
Course: Main Course
Cuisine: Italian
a close up of a piece of zucchini lasagna on white plates topped with freshly chopped parsley

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Zucchini Lasagna

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Hi! I'm Lisa Longley, and I am committed to giving you simple dinner ideas and recipes that are easy to make; recipes that will fill your home with joy. I am the owner and author of SimpleJoy.com and I'm so glad that you are here.

Reader Interactions


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    Rate This Recipe:

  1. Sarah Marsic says

    5 stars
    I saw this recipe on Facebook and went to the store a couple days later to get the ingredients. I’m so glad I did. Followed directions and measurements exactly, except I forgot to buy a red pepper and I used fresh basil from our garden instead of dried. It was DELICIOUS!! So very flavorful and easy to make. My meat lover husband devoured it and even went back for a second serving. I’m definitely planning to put this in our rotation of regular dinner ideas. I’m going to serve it to guests too….it’s that good!!

    • Lisa Longley says

      Music to my ears! I love it when meat lovers fall in love with one of my vegetarian recipes – I don’t know why, it feels like I won a prize, lol! I’m so happy that you and your husband enjoyed it and you found it easy to make. Thank you for taking the time to come back and let me know!

  2. Cathy says

    As you knew your zucchini recipes hit my inbox at just the right time. I can’t believe how good the lasagna was. The chocolate cake was a winner. Loved the banada bread and muffins. Zucchini boats are next. All are headed in to my regular file. Have always enjoyed your emails but this one was a life save.

    • Lisa Longley says

      This makes me so happy! I’m so glad that you liked all of them!

  3. Kathy says

    Do you cook lasagna before freezing

    • Lisa Longley says

      No, you don’t. Make it through step 8, then freeze it. There are instructions in the post on how to bake from frozen.

  4. Suzan Gannett says

    5 stars
    We love this recipe. I have made it several times now. Friends liked it so much they asked for the recipe!

    • Lisa Longley says

      I’m so glad to hear it!

  5. Sarah Marsic says

    This recipe is perfect the way it’s written. The zucchini lasagna is flavorful and filling. I’ve served it to guests and they raved about how good it is. Thanks for sharing this delicious dish!

    • Lisa Longley says

      I’m so glad you liked it, Sarah!

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5 Secrets to Stress Free Dinners



5 Secrets to Stress Free Dinners