1 9-inch unbaked pie shell
1/4 cup onion, diced and sautéed
1 cup any combination of cooked vegetables, meat, fish or tofu
1 cup cheese, grated
1-1/2 cup whole milk
salt and pepper to taste
Bake pie shell until barely set and very lightly browned, about 7 minutes at 350°.
Scatter onion, vegetables/protein and cheese evenly across bottom of pie shell. Beat eggs thoroughly and stir in milk. Add salt and pepper. Pour egg mixture over onions & cheese. Bake at 375° for 40-45 minutes, until top is puffy and golden brown and middle is just barely set. Remove from oven and let stand for 15 minutes. Serve warm, room temperature or cold. Be sure to refrigerate leftovers.