Cook beef: Heat olive oil in a large pan over high heat. Add ground beef and let it sear for 1 minute without stirring. Break apart with a wooden spoon and cook until the beef is no longer red. Add taco seasoning and cook until fully browned. Drain excess grease if needed.
Stir in tomato paste, then gradually add water to deglaze the pan and moisten the meat. Cook until most of the liquid has evaporated and the mixture is saucy but not watery. Taste and adjust seasoning if needed.
Assemble Crunchwraps: Place 1/4 cup beef in the center of a large tortilla. Top with 1–2 tablespoons nacho cheese (or to preference). Add 2 broken-up tostada pieces (or chips). Carefully spread 1-1/2 tablespoons sour cream on top of the chips, then add 1-1/2 tablespoons lettuce and 1-1/2 tablespoons tomatoes.
Fold the bottom edge of the tortilla up over the filling. Continue folding around the circle, pleating as you go, until fully sealed. Gently press down to compress everything together.
Melt 1 tablespoon butter in a large skillet over medium heat. Place Crunchwrap seam-side down and gently press down with a spatula. Cook 90 seconds to 2 minutes per side, until golden and crisp.
Wipe out pan and continue to cook remaining Crunchwraps, adding more butter as needed.
Serve immediately with guacamole or avocado, sour cream, hot sauce, and fresh lime.
Notes
Note 1: Mix together 1 tablespoon chili powder, 1 teaspoon ground cumin, 1 teaspoon paprika, 1 teaspoon onion powder, 1 teaspoon garlic powder, 1/2 teaspoon dried oregano, 1/2 teaspoon salt, 1/2 teaspoon pepper, and 1 teaspoon beef bouillon powder until evenly combined.Note 2: Warming tortillas helps prevent cracking. Heat in a skillet or microwave for a few seconds per side.Note 3: Serve with guacamole or avocado, sour cream, hot sauce, and/or fresh lime.Storage: These are best eaten right after being made. Store leftovers in an airtight container in the fridge for up to 4 days. Reheat: Microwave for 1 minute, then crisp in a skillet for 2–3 minutes per side, or air fry at 390°F for 5–6 minutes, flipping halfway.