Preheat an oven or toaster oven to broil (very hot).
In a saucepan, combine everything but the egg and toast, stirring over low heat until the cheese is melted and the sauce is smooth. Generally you don't need flour or to make a roux to start, but if it's too thin a half teaspoon whisked in can help.
Now is a good time to start the toast. In a toaster, oven, or pan, whatever floats your boat. When it's done, put the slices in an oven safe pan.
Gradually, that is slowly, add cheese sauce to your slightly beaten egg.
While it's still piping hot, pour over the hot toast and shot it in the oven until slightly browned.
Serve immediately !
