Initially, ratatouille was a success only among humble farmers. They prepared a dish from vegetables that they grew in their own gardens: peppers, tomatoes, onions, garlic and zucchini. Be sure to add olive oil and basil. It didn't take long before ratatouille became the most famous French vegetable dish. And, perhaps, the most useful thanks to al dente - a cooking option in which vegetables retain their shape, elasticity and maximum vitamins.