A sandwich with a crunch can refer to two different types of sandwiches: a taco and a BLT. A taco is a Mexican-style sandwich made with a folded or rolled tortilla filled with various ingredients such as beef, cheese, lettuce, tomatoes, and salsa. A BLT is a classic American sandwich made with bacon, lettuce, and tomato on toasted bread. Both sandwiches provide a crunchy texture from the tortilla or toast, making them a great option for those looking for a satisfying crunch in their sandwich.