- cooking spray (such as Pam®)
- 1 1/2 pounds ground beef
- 1 cup chopped onion
- 1/2 cup water
- 1 (1 ounce) package taco seasoning mix
- 1 (10 ounce) can refried beans (optional)
- 1/2 cup salsa
- 1 (6 ounce) can sliced black olives (optional)
- 1 (4 ounce) can diced green chiles
- 15 taco shells, broken up, or more to taste
- 2 cups shredded Cheddar cheese
- Preheat oven to 375 degrees F (190 degrees C). Spray a 9×13-inch baking pan with cooking spray.
- Cook ground beef and onions in a skillet over medium heat until beef is browned, 7 to 10 minutes; drain grease. Stir in water and taco seasoning; cook, stirring often, until thickened, about 2 minutes. Add refried beans, salsa, olives, and green chiles. Cook and stir over low heat until ingredients are warmed through, 3 to 4 minutes.
- Place half of the taco shells in the bottom of the baking dish. Pour in half of the ground beef mixture; sprinkle with half of the Cheddar cheese. Repeat with remaining taco shells, ground beef mixture, and Cheddar cheese.
- Bake in the preheated oven until cheese is melted and bubbly, 20 to 25 minutes.