Sweet potato crust quiche

Ingredients For the Crust:• 2 large sweet potatoes (about 2 lbs), peeled and grated on a large-holed box grater or in food processor• 1 teaspoons salt• 1/2 teaspoon pepper• pinch crushed red pepper flakes• 1-2 eggs For the Filling:• 1 leek, white and green parts washed and chopped (I like using Trader Joe’s already trimmed)• […]