A grilled cheese sandwich is a popular vegetarian sandwich made with cheese and bread, grilled until the cheese is melted and gooey.

Hummus is a popular vegan sandwich spread made from chickpeas, tahini, olive oil, and spices.

Falafel sandwiches typically include falafel, lettuce, tomatoes, and other vegetables.

Whole wheat bread is a popular choice for vegan sandwiches because it is a healthier alternative to white bread.

Lettuce, tomatoes, and cucumbers are all common vegetables used in vegetarian sandwiches.

Feta cheese is a popular choice for vegetarian sandwiches because it is a tangy and flavorful cheese.

Tofu, tempeh, and seitan are all common protein sources used in vegan sandwiches.

Mayonnaise, mustard, and ketchup are all common sauces used in vegetarian sandwiches.

French fries, salad, and soup are all common side dishes served with vegetarian or vegan sandwiches.

Grilled vegetable sandwiches are made with grilled vegetables, such as zucchini, eggplant, and bell peppers.

Tofu scramble sandwiches, tofu steak sandwiches, and tofu burgers are all common types of vegan sandwiches that are made with tofu.

Tempeh bacon sandwiches, tempeh burgers, and tempeh Reuben sandwiches are all common types of vegetarian sandwiches that are made with tempeh.

Seitan steak sandwiches, seitan burgers, and seitan gyros are all common types of vegan sandwiches that are made with seitan.

Egg salad sandwiches, omelet sandwiches, and frittata sandwiches are all common types of vegetarian sandwiches that are made with eggs.

Avocado toast, avocado and hummus sandwiches, and avocado and chickpea salad sandwiches are all common types of vegan sandwiches that are made with avocado.