01 -
In a large skillet over medium heat, brown the ground beef, breaking it into small pieces until fully cooked with no pink remaining. If using, add diced onions, bell peppers, and minced garlic; sauté together until softened.
02 -
Sprinkle taco seasoning over the cooked beef mixture, then pour in water. Stir well to combine. Let simmer uncovered for 5 minutes to meld flavors. Add diced tomatoes and black beans if using, then continue simmering for an additional 5 to 10 minutes until mixture thickens but remains moist.
03 -
Preheat the oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish to prevent sticking.
04 -
Place two tortillas on the bottom of the baking dish. Evenly spread half of the warmed refried beans over the tortillas.
05 -
Top the bean layer with half of the beef mixture, then sprinkle generously with one-third of the shredded cheddar cheese.
06 -
Add two more tortillas on top, spread the remaining refried beans and beef mixture, then cover with another third of the cheese.
07 -
Place the last two tortillas on top and scatter the remaining shredded cheese evenly over the surface.
08 -
Cover the baking dish with aluminum foil and bake for 25 minutes to soften layers and melt the cheese.
09 -
Remove the foil and return the dish to the oven for 10 minutes to develop a golden-brown, slightly crisp cheese topping.
10 -
Allow the lasagna to rest for 5 minutes after baking. Slice and serve with preferred toppings such as shredded lettuce, sour cream, avocado, and salsa.