In a dutch oven over medium heat, add the ground beef. Once it has been broken up and begins to brown, add the onion, jalapeño, and garlic. Cook until the onion is translucent and the beef is cooked through, about 5 to 7 minutes. Drain off any excess grease.
1 1/2 pounds ground beef, 1 small yellow onion, 1 jalapeno pepper, 4 garlic cloves
Stir the tomatoes, green chiles, chili powder, cumin, kosher salt, and black pepper into the beef mixture. Remove from the heat. Stir in the corn and cheese, and set aside.
14.5 ounces diced tomatoes, 4 ounces green chilies, 1 tablespoon chili powder, 2 teaspoons cumin, 1 1/2 teaspoons kosher salt, 1/4 teaspoon black pepper, 1 cup frozen corn, 1 cup cheddar cheese, 1 cup Monterey Jack cheese