Spinach, Bacon, and Cheese Quiche

Ingredients

• 1 1/2 ounces brown rice flour (about 1⁄3 cup)
• 1.4 ounces sweet white sorghum flour (about 1⁄3 cup)
• 1.4 ounces tapioca flour (about 1⁄3 cup)
• 1.3 ounces potato starch (about 1⁄4 cup)
• 1/4 teaspoon xanthan gum
• 1/4 teaspoon salt
• 3 tablespoons unsalted butter
• 1 tablespoon fat-free milk
• 1 large egg
• Cooking spray
• 9 slices center-cut bacon (4 ounces)
• 2 1/2 cups bagged baby spinach leaves (3 ounces)
• 2 ounces reduced-fat cheddar cheese (shredded, about 1 1⁄2 cups)
• 2 ounces Swiss cheese (shredded, about 1 1⁄2 cups)
• 1 1/4 cups fat-free milk
• 1/4 teaspoon freshly ground black pepper
• 1/8 teaspoon salt
• 5 large eggs
• 2 large egg whites