Preheat griddle to 375–400°F, add a little oil, and brown the ground beef directly on the griddle; once fully cooked, mix in taco seasoning and a splash of water.
Warm large tortillas on the griddle for 20 seconds per side to make them easier to fold.
Lay a tortilla flat and add 2 tablespoons of nacho cheese or shredded cheese to the center.
Spoon seasoned beef (or chicken) over the cheese, then top with a tostada shell or crushed chips.
Spread sour cream on the tostada, then layer on shredded lettuce, and diced tomato.
Fold the edges of the tortilla up and over the center to form a sealed, hexagon-shaped wrap.
Lightly oil the griddle and place the Crunchwrap seam-side down to seal.
Cook for 2–3 minutes until golden brown, then flip and cook the other side another 2–3 minutes.
Remove from griddle, slice in half, and serve hot with extra sour cream or hot sauce if desired.