In a large skillet, heat the oil over medium heat. Add the lean ground beef and cook until browned, breaking it up with a spatula as it cooks. Drain any excess fat.
Once the beef is browned, stir in the taco seasoning and water. Let it simmer for about 5 minutes until the sauce thickens and the flavors meld together.
Preheat your oven to 400°F (200°C) so it’s ready for baking your Mexican Pizza (Taco Bell Copycat).
On a baking sheet, arrange 10 corn tortillas in a single layer. Spread a generous amount of refried beans on top of each tortilla.
Spoon the seasoned ground beef evenly over the refried beans on each tortilla.
Drizzle the red enchilada sauce over the beef layer, spreading it out evenly for maximum flavor.
Sprinkle a generous amount of shredded cheddar cheese over the enchilada sauce, ensuring that each pizza is well-covered.
Place another layer of corn tortillas on top of each pizza, creating a double-decker effect. Repeat the layering process with the remaining ingredients.
Once all layers are assembled, place the baking sheet in the preheated oven and bake for about 15-20 minutes or until the cheese is melted and bubbly.
Remove the Mexican Pizza (Taco Bell Copycat) from the oven and allow it to cool slightly. Top with diced Roma tomatoes, sliced olives, and chopped green onions for a fresh finish.