Cook ground beef with diced onion in a large skillet over medium heat until browned. Drain excess fat, add minced garlic, and stir until fragrant.
In a 9x13 baking dish, layer corn chips on the bottom and then evenly spread the seasoned beef mixture over the chips.
Sprinkle shredded cheddar cheese over the beef mixture and top with additional corn chips for extra crunch.
Bake in a preheated oven at 350°F for 15 to 20 minutes until the cheese is melted and bubbly. Optionally broil for 2 minutes for a golden edge.
After baking, let the casserole rest for a few minutes. Top with shredded lettuce, diced tomatoes, sliced jalapeños, olives, and a dollop of sour cream.
Scoop generous portions and serve warm. Enjoy with extra salsa or guacamole on the side.
Notes
Enjoy this easy-to-make walking taco casserole, a perfect twist on classic walking tacos that is both comforting and flavorful.