01 -
Preheat oven to 350°F. In a large skillet over medium-high heat, cook ground beef and diced onion until no pink remains, breaking the meat apart. Add minced garlic and cook 30-45 seconds until fragrant, then drain excess grease.
02 -
Stir taco seasoning into the beef mixture. Add undrained Rotel tomatoes and drained Mexicorn, mixing thoroughly until heated through.
03 -
In a 7x11 inch casserole dish, spread half of the meat mixture evenly. Top with half of the shredded cheese, then layer half of the crushed Doritos over the cheese.
04 -
Repeat layering with remaining meat mixture, cheese, and crushed Doritos to create two complete layers.
05 -
Bake at 350°F for 15-20 minutes until cheese is melted and bubbly, with Doritos maintaining some crispness. Remove from oven and let cool 5 minutes before serving.
06 -
Top with dollops of sour cream and fresh pico de gallo if desired. Serve warm.