Step 1

Preheat the oven to 375 . Dice 3 T butter and refrigerate. In a large saute pan, cook the onions in the remaining butter and oil, starting over medium heat and gradually reducing to low heat, for about 1 hour, until the onions are very tender, golden, and reduced considerably in size. Stir continuously for the last 15 min and be very careful not to let them burn.

Step 2

They will be extraordinarily sweet and delectable. Discard any burned parts. Sprinkle the onions w/the flour, using a strainer or sifter, and saute another 2 or 3 minutes. Beat the eggs and cream in a bowl with a third of the cheese. Stir in the onions, then pour the mixture into the quiche shell. Sprinkle with remaining cheese and dot with the diced butter. Bake 25-30 minutes or until browned and set.