01 -
Preheat oven to 350°F. In a large skillet over medium-high heat, cook ground beef and diced onion until no pink remains in the meat, breaking it up as it cooks. Add minced garlic and cook for 30-45 seconds until fragrant, then drain any excess grease.
02 -
Add taco seasoning to the beef and stir to coat. Add the undrained Rotel tomatoes and drained Mexicorn. Mix until everything is well combined and heated through.
03 -
In a 7x11 inch casserole dish, spread half of the meat mixture in an even layer on the bottom. Top with half of the shredded cheese, then add a layer of half the crushed Doritos.
04 -
Repeat the layering process one more time: remaining meat mixture, remaining cheese, and remaining crushed Doritos on top. This creates two complete layers.
05 -
Bake at 350°F for 15-20 minutes until the cheese is completely melted and bubbly. The Doritos on top should maintain some texture.
06 -
Remove from oven and let cool for 5 minutes. Top with dollops of sour cream and fresh pico de gallo if desired. Serve hot and enjoy.