Preparation
Slice the top off the cheese and reserve. Gently scoop out the inside, leaving a 1/4 to 1/2 inch shell. The cheese should resemble a hollowed out pumpkin.
Sauté the remaining ingredients, except the eggs, in the butter; simmer for about 20 minutes.
Beat 4 eggs and stir into the mixture.
Spoon it into the cheese shell, replace the top and spread remaining beaten egg on top to seal.
Grease a shallow baking dish and fill it with about 1 inch of water; set the cheese in the dish and bake at 350° F for 1 to 1 1/2 hours.
The cheese will expand and flatten slightly but will keep its basic shape.
Serve piping hot, cut into wedges.
Leftovers are good reheated.