We love this veggie gratin so much because it’s one of those awesome dishes that’s hearty enough to be eaten alone or as a side – and it tastes as amazing as it looks! We like it over creamy polenta and crusty bread, and it goes great alongside meat, poultry or fish. Feel free to switch out any of the vegetables for other seasonal choices, too! This really is as versatile as it gets, and the ingredients will keep well in the fridge overnight, so you can slice and assemble it a day ahead. Easy, delicious and colorful, this is one of our favorite summer vegetable recipes, and perfect for bringing to that next potluck!