1 cup grated cheddar cheese
1 1/2 sticks (3/4 c) butter
1 8-ounce pkg cream cheese
10 eggs
2 cups milk
1/2 tsp dry mustard
dash of cayenne pepper
1/2 tsp salt
1 tsp chopped chives
Generously butter a 9 x 13 baking dish. Tear onion rolls into chunks and place them in the bottom of the baking dish. Sprinkle with cheddar cheese, then tear cream cheese into small pieces and place over the top. Cut 1 1/2 sticks butter into pats and place over top.
Mix remaining ingredients and pour over the top of dish. Cover and refrigerate over night.
The next morning, bake at 325 degrees, covered, for 45 minutes. Then remove foil and continue baking at 350 for 10-15 minutes.
Eat. Faint. Repeat.