Cinco de Mayo Casserole

1 . Stage

Preheat the oven to 350 degrees F (175 degrees C).

2 . Stage

Heat a large skillet over medium-high heat. Cook and stir beef in the hot skillet until browned and crumbly, 5 to 7 minutes; drain and discard grease. Transfer beef to a 9x13-inch casserole dish.

3 . Stage

Heat oil in the same skillet over medium heat; cook and stir onion and garlic in hot oil until onion is translucent, about 10 minutes. Spoon onion mixture over ground beef.

4 . Stage

Mix tomatoes with green chile peppers, salsa, sour cream, 1 cup Cheddar cheese, corn, salt, and black pepper into ground beef mixture; top with remaining 2 cups Cheddar cheese.

5 . Stage

Bake in the preheated oven until cooked through and cheese is melted, about 45 minutes. Let stand for 10 minutes before serving.