I'm an omnivore, but grew up in Greece, where vegetarian and vegan meals are very common. I make "ladera" - vegetable stews where things like green beans, eggplant, zucchini, or potatoes are cooked with onions, tomato, and olive oil. Lentil soup or bean soup. Stewed chick peas. Spinach rice (spanakorizo). All of these are vegan. Greeks usually serve these vegan meals with feta or cheese, unless doing a religious fast.