Old-Fashioned Salisbury Steak With Gravy

Ingredients
- 1- lb lean hamburger
- 13 c finely chopped onion
- 14 c saltine cracker crumbs
- 1 egg white slightly beaten
- 2 TBSP milk
- 1 TBSP horseradish
- 14 tsp salt dash pepper
Directions
- MUSHROOM
- GRAVY
- 1- 12 oz jar prepared brown beef gravy 4-oz mushrooms sliced 2 TBSP water