- Meatloaf:
- 3 pounds ground beef
- 1 sweet potato, diced
- 1 onion, chopped
- 1/2 cup oats
- 2 eggs, beaten
- 1 teaspoon salt
- 1/3 teaspoon thyme
- 1 pinch ground black pepper, or to taste
- 3/4 cup ketchup
- 1/4 cup vegetable juice
- 2 tablespoons Worcestershire sauce
- 1 tablespoon prepared mustard
- 1 teaspoon mustard powder
- Topping:
- 3/4 cup ketchup
- 1/3 cup brown sugar
- 1 teaspoon prepared mustard
- Mix ground beef, sweet potato, onion, and oats in a large mixing bowl.
- Beat eggs, salt, thyme, and pepper together in a small bowl. Add 3/4 cup ketchup, vegetable juice, Worcestershire sauce, 1 tablespoon prepared mustard, and mustard powder to the egg mixture; stir. Pour the egg mixture into the large mixing bowl; use your hands to mix together. Cover bowl with plastic wrap and refrigerate 8 hours to overnight.
- Preheat oven to 350 degrees F (175 degrees C). Grease 2 8 1/2x4x3-inch glass bread pans.
- Divide meatloaf mixture into prepared bread pans.
- Bake meat loaves on center rack in preheated oven for 1 hour.
- Stir 3/4 cup ketchup, brown sugar, and 1 teaspoon prepared mustard together in a bowl; spread over the meatloaf.
- Divide ketchup mixture and spread over the loaves; continue baking for 15 minutes.