Some great ideas here that I will keep for future! Here is my delicious bake recipe - this is for a crowd, but you can cut it down easily. Also works brilliantly for leftovers. Can be prepped in advance so more fun time for you :)
Mushroom and Egg Bake (Overnight!)
3 tbsp. butter
1/3 cup all-purpose flour
1 1/2 cups milk
4.5 oz sliced mushrooms
10 eggs
2/3 cup half and half
¼ tsp salt
1/8 tsp pepper
½ - 1 large red onion, chopped roughly
Grated cheese to taste (I used strong cheddar)
Night before: In saucepan melt 3 tbsp. butter, stir in flour until smooth, and gradually add milk. Bring to boil, cook and stir for 2 minutes or until thickened. Stir in raw mushrooms, set aside.
Cook onion until caramelized. Layer in bottom of greased baking dish. Spread mushroom sauce over onion. Grate cheddar on top, to taste. Cover and refrigerate overnight.
In separate bowl, mix eggs, salt, pepper and half and half. Cover and refrigerate overnight.
Next morning (or several hours later): Remove from refrigerator 30 minutes before baking. Stir eggs, pour over mushroom mix. Bake uncovered at 325 for 30-35 minutes or until nicely browned and puffy. Yield 10/12 servings.
Feel free to mix it up and add or omit ingredients as you wish. Bacon/sausage/peppers/corn/peas? Any and all would be good. Enjoy!