Toss the spinach with the garlic and spread it in the cooled pastry shell. Preparation. Transfer the quiche … melt butter in medium sauce pan and add shallots, garlic and bell pepper. NOTE: You can bake your onion roses and quiche at the same time if you have a large oven. This easy, low carb sweet potato crust quiche is perfect for customizing with your favorite veggies and makes a wonderful, protein-packed breakfast or brunch! You can place the onion roses on the top rack and the quiche on the bottom, but only as long as the top pan doesn’t block the quiche from the heat that comes from the top of your oven. In a medium bowl, whisk the milk with the cream, eggs, egg yolks, salt and pepper. 15 mins. Cook Time. How to Make Quiche with Spinach, Goat Cheese and Caramelized Onion – Step by Step. Spinach and goat cheese quiche made with a scrumptious sweet potato crust to keep it gluten & grain free and filled with nutrients. beat eggs in large bowl and set aside. Instead of the ham and shredded cheese of the classic Quiche Lorraine, this version is made with spinach and goat cheese, so it’s a vegetarian meal and a bit healthier. Arrange the goat cheese rounds on the spinach. About the cheese, it’s very common to find fresh goat cheese in France, we really like it with a slice of bread. Pour the custard into the shell and bake for about 40 minutes, or until just set. preheat oven to 375°F. Prep Time.