Salisbury Steak Bake | Cooking Professionally

Ingredients

• 2 pounds lean ground beef
• 1 cup mushrooms, diced
• 1 cup onions, diced
• 1 (0.87-ounce) brown gravy mix
• 1 (10.5-ounce) can condensed cream of mushroom soup
• 3 cups water
• 1/4 cup butter
• 1 1/2 cups milk
• 1 (8-ounce) package instant mashed potato mix, butter and herb flavored