Potato Crust Quiche Recipe | King Arthur Baking

Ingredients

• 1/2 cup (85g) onion, coarsely grated
• 1 teaspoon table salt
• 1 teaspoon dried thyme
• 1/4 cup (30g) King Arthur Unbleached All-Purpose Flour*
• 1 1/2 pounds Idaho potatoes, peeled
• 2 tablespoons (25g) olive oil
• 1 large leek, sliced washed and drained (about 2 1/2 cups)
• 4 cups (283g) mushrooms, sliced
• salt and pepper, to taste
• 1 cup (113g) fontina or Swiss cheese, grated
• 5 large eggs*
• 1/2 cup (113g) milk
• 1/4 teaspoon Worcestershire sauce