Meatloaf and Baked Mashed Potatoes

Name: Meatloaf and Baked Mashed Potatoes
Ingredients: 1 1/2 pounds (8 to 10) Yukon Gold or other waxy potatoes, well scrubbed; 3 slices (1 ounce each) white sandwich bread, torn into very small pieces; 1 1/4 cups milk; 1 1/2 pounds ground beef chuck; 1 small onion, grated; 2 garlic cloves, minced; 1/2 cup flat-leaf parsley, finely chopped; 1 large egg, lightly beaten; 1 teaspoon dried thyme; 1 teaspoon dried oregano; 2 cups store-bought marinara sauce; Coarse salt and ground pepper; 4 tablespoons (1/2 stick) butter