Instead of the usual quiche, our gorgeous-looking frittata-style puffs ? soaked in a muffin pan ? make pretty individual servings.
Prepare mushroom mixture and cool. Stir in green onion and feta. Prepare egg mixture and pour into a storage container. Cover both and refrigerate overnight. When ready to bake, spoon mushroom mixture into oiled muffin cups. Pour egg mixture overtop. Bake as above.