Revisit the BLT with this vegetarian option. Spread mayonnaise on two slices of bread, then top them with avocado and tomato. Marinated and grilled slices of tempeh add a crunchy dose of protein to the sandwich. This is a perfect small lunch, boosted by the sweet saltiness of the marinade and freshness of the vegetables. A single bite will convince even the biggest lovers of this classic sandwich that the veggie version can be just as great.