Salisbury Steak

Ingredients

• 1 lb. lean ground beef
• 1 egg white, lightly beaten
• 1/3 c. chopped onion
• 1/4 c. saltine crumbs
• 2 Tbsp. milk
• 1 Tbsp. prepared horseradish
• 1/4 tsp. salt
• 1/8 tsp. pepper
• 1 (12 oz.) jar beef gravy*
• 1 1/2 c. sliced fresh mushrooms
• 2 Tbsp. water
• hot cooked noodles