Onions A Bellagio

 

Process

 "Cut Spanish onions in half and cook in salted water, drain, and put in well buttered baking dish. Prepare sauce as follows:

2 Tablespoons butter

2 Tablespoons flour

1 and 1/2 cup milk

salt and pepper

1/2 cup grated cheese. 

Mix in a pan and stir until boiling. Remove from fire and add the yolks of 3 eggs. Allow to cook a little and then pour over onions. Put melted butter on top and put in oven until brown. "