Elevate your stuffed mushrooms by filling them with a flavorful ratatouille mixture. Remove the stems from large mushrooms and fill the caps with a mixture of diced eggplant, zucchini, bell peppers, and tomatoes. Top with breadcrumbs and bake until the mushrooms are tender and the filling is hot and bubbly. These stuffed mushrooms make a delicious and elegant appetizer or a tasty side dish. The combination of the earthy mushrooms and the savory ratatouille is simply irresistible.