There's this from the SOAR site. I've never made it, but Elvis liked it cold as a sandwich with American cheese and both ketchup and mayonaise.

Graceland Oatmeal Meatloaf

From: The Meades
Date: Tue, 30 Jan 1996

2 green peppers -- diced
2 medium onions -- diced
2 large eggs -- lightly beaten
2 pounds ground chuck
1 pound bulk sausage meat
1/2 teaspoon salt
1/2 teaspoon black pepper
1/2 teaspoon garlic powder
1/4 teaspoon onion powder
1 cup rolled oats
1-1/2 cups Hunt's ketchup

Preheat the oven to 375 degrees F.

Combine all the ingredients except 1/2 cup of the ketchup in a large mixing bowl.

Mix well and shape into a nice, even loaf

Place the loaf in a shallow baking dish and top with the remaining ketchup

Bake for 90 minutes or until well-done