• Preheat oven to 350 degrees.

Prepare the beef mixture

• Sautee diced onion in a large nonstick pan with olive oil over medium heat, about 10 minutes. Add garlic and cook for 5 more minutes.
• Add ground beef and cook till browned.
• Stir in tomato paste and taco seasoning.
• Remove from heat, drain grease, and set cooked meat aside.

Prepare the wrap

• Place 1 tortilla on the center of a baking tray covered with tinfoil and cooking spray. Arrange 6 tortillas around the board of the baking tray so that the bottom of the tray is completely covered and half of each of the 6 tortilla are draped over the side.
• Sprinkle 2.5 cups of cheese over the tortillas.
• Using a slotted spoon, sprinkle the beef mixture over the cheese (to avoid adding grease to the wrap). Top with black beans and corn, then 6 tostadas.
• Sprinkle remaining 2.5 cups of cheese over the tostadas.
• Cover with the remaining tortilla.
• Place a baking tray on top of the wrap. Place a cast iron on top of the baking tray.
• Bake for 25 minutes.
• Flip the wrap onto a cutting board. Cut into 8 equal pieces. Sprinkle cilantro on top.
• Serve with sour cream and salsa.