I like plain onion with caraway seeds and sharp cheddar cheese.
I just cook down the onions and caraway seeds in butter and make an onion jam.
I mix that with one cup of milk, two eggs, a cup of grated cheese, salt, pepper, nutmeg. Pour into a 9 inch shell and bake at 425 for fifteen minutes, reduce heat to 350 for another 20 to 30 minutes, cool slightly and enjoy.
I usually use evaporated milk.
I usually cheat and use a frozen crust.
I add up to two cups of vegetables or meats.
Leftover broccoli is very nice.
We call it egg pie at my house, it is a great way to use musgoes!