Add 1 tablespoon of oil to a large skillet over medium heat. Cook the ground beef and onion until the beef is no longer pink and the onion is translucent, about 6-8 minutes. Stir in the taco seasoning and set aside.
Vegetable oil, 1 pound 85% lean ground beef, 2 tablespoons taco seasoning, ½ onion
White the beef cooks, set a tostada shell on top of a large flour tortilla. Using kitchen scissors, cut out a smaller flour tortilla that is the same size as the tostada. Repeat until you have 4 smaller flour tortillas. Keep 4 large flour tortillas uncut.
8 large flour tortillas, 4 corn tostadas
Place a large flour tortilla on your board.
Add a scoop of ground beef to the center and spread it into an even circle about the size of your tostada.
Drizzle on the cheese sauce and place a tostada on top.
½ cup nacho cheese sauce
Spread sour cream over the tostada, then top with lettuce, tomato, and cheese.
1 cup low-fat sour cream, 2 cups shredded lettuce, 1 cup chopped tomatoes, 1½ cups shredded Mexican cheese blend
Place smaller flour tortilla cutouts on top and tightly fold edges of the large tortilla toward the center. Turn the Crunchwrap upside down so the folds are on the bottom. This will help it stay together.
Heat 1 tablespoon of oil in a large nonstick skillet over medium heat. Carefully place the crunchwrap, folded side down, in the skillet. Cook until the underside is deeply golden, about 3-5 minutes. Flip and cook until the second side is golden. Serve immediately.