Stuffed Bell Peppers Vegan are incredibly delicious and healthy: lean protein, veggies and whole grain. This recipe is easy to customize to fit your tastes: you can swap green lentils with mushrooms, instead of rice you can use quinoa or riced cauliflower and so on. Also you can stuff all kinds of vegetables: tomatoes, zucchini, cabbage and grape leaves. Feel free to add your own twist; it's just a basic recipe.