Preheat oven to 375 degrees.
Line a 9 inch pie plate with pastry and line the pastry with foil. Add dried beans to weight the bottom down and bake 30 minutes. Remove the foil and beans.
Cook the bacon until crisp and remove it from the skillet. Pour off all but 1 tablespoon of the fat remaining in the skillet. Cook the onions in the remaining fat until they are transparent.
Crumble the bacon. Sprinkle the bacon, onions and cheeses over the inside of the baked shell.
Combine the eggs, cream, milk, nutmeg, salt and pepper and strain over the onion cheese mixture.
Bake the pie 45 minutes or until a knife inserted 1 inch from the pastry edge comes out clean. Cut into wedges and serve immediately.
