This hearty casserole will please everyone around the dinner table, especially if you serve the toppings on the side and let people help themselves. Fire-roasted tomatoes give the usual mix of ground beef and taco seasonings a big punch of flavor. Choose a hefty corn tortilla, such as La Tortilla Factory brand, which will retain its texture and not break down while baking.
How to Make It
Preheat oven to 400°F. Heat oil in a large skillet over high. Add beef; cook, stirring often, until browned, 6 minutes. Add half of onion to skillet. Cook, stirring often, until softened, 5 minutes.
Add tomatoes, beans, taco seasoning, and 1/2 cup water to skillet, stirring to combine. Bring to a boil; reduce heat to medium. Simmer, stirring often, until slightly reduced, 3 minutes. Remove from heat.
Heat tortillas in a dry skillet over high, 15 seconds per side. Transfer to a plate; cover with a paper towel to keep warm.
Place 3 tortillas in an 8-inch square baking dish. Top with 2 cups of the beef mixture; sprinkle with 1/2 cup of the cheese. Repeat layers 2 more times. Bake in preheated oven until cheese is melted, 8 minutes. Remove from oven. Top with lettuce, pico de gallo, and remaining onion.