This eggless onion quiche is a delicious and savory dish that is perfect for breakfast, brunch, or even as a light dinner. Made with a flaky pastry crust and a creamy filling of caramelized onions, herbs, and spices, this quiche is packed with flavor. The absence of eggs makes it suitable for those with dietary restrictions or allergies. Serve it warm or at room temperature with a side salad for a satisfying meal.