Smothered Meatloaf

Name: Smothered Meatloaf
Ingredients: 4 cups Potatoes O'Brien (recommended: Ore-Ida); 1 pound lean ground beef; 1 1/4 pounds ground pork; 1 (5.29-ounce) box Garlic Herb Shake and Bake (recommended: Kraft); 1 (1.1-ounce) envelope Beefy Onion Soup Mix (recommended: Lipton); 1 (4.5-ounce) jar Sliced Mushrooms, drained (recommended: Green Giant); 1 egg; 1 (12-ounce) can condensed Cheddar soup, divided; 1/2 cup evaporated milk; 1 (10-ounce) can condensed cream of mushroom soup; 1 onion, sliced thin; 1 (8-ounce) package sliced fresh mushrooms