01 - Heat olive oil in a large skillet over medium-high heat. Add the diced red onion and cook for about 2 minutes, stirring occasionally, until softened and translucent.
02 - Add the ground beef to the skillet and cook, breaking it apart with a spoon or spatula, for 5 to 7 minutes until fully browned and no pink remains. Drain any excess fat from the pan.
03 - Sprinkle in the chili powder, ground cumin, smoked paprika, garlic powder, onion powder, kosher salt, and black pepper. Stir thoroughly to coat the beef evenly and cook for an additional 2 minutes. Remove the skillet from heat and set aside.
04 - Warm the large flour tortillas in a microwave for 15 to 20 seconds or briefly on a dry skillet until pliable and easy to fold without cracking.
05 - Lay a large flour tortilla flat. Spread about 2 tablespoons of nacho cheese sauce in the center. Layer with the seasoned beef mixture, shredded cheddar cheese, a tostada shell (or a handful of tortilla chips), salsa, shredded lettuce, diced tomato, jalapeño slices if desired, and a dollop of sour cream.
06 - If using the small tortillas, place one on top of the filling to help contain it. Working around the wrap, fold the edges of the large tortilla up and over the center, overlapping as needed to form a hexagonal shape. Press gently to seal.
07 - Heat a clean skillet over medium heat. Place the wrapped crunch wrap seam-side down and toast for 2 to 3 minutes until the bottom is golden brown and crisp. Carefully flip and toast the other side for an additional 2 minutes.
08 - Transfer the toasted wrap to a cutting board, slice in half diagonally, and serve immediately while hot and crispy.