Onion Burgers

I saw Paula Deen make these once on her show.  I gave them a try and they are really good.  An alternative to a regular hamburger.

1 pound ground beef
2-3 tablespoons all purpose flour
1 can french onion soup
yellow mustard
mayonnaise
loaf bread
sliced onion

Scramble the ground beef in a pan until the pink is gone.  Drain the excess grease.  Add the flour.  Stir until it's incorporated into the pan juices then add 1/2 cup of the onion soup. Stir unil it becomes thick.  Meanwhile spread the bread with mayonnaise and mustard.  Spoon the meat mixture onto the bread and top with a slice of onion.