Traditional quiche is full of cheese, eggs, cream and made with a buttery pie crust, all of which are high-calorie and can be fatty.  You can make a healthier quiche by using low-calorie, low-fat ingredients and adding vegetables. This dairy-free low-fat quiche recipe is perfect for pretty much any meal – the quiche can be made ahead and is just as flavorful served warm or at room temperature.This crustless quiche combines sautéed onions, mushrooms, and steamed zucchini but you can add in any vegetable you want.