Classic Baked Swedish Meatballs

Recipe from The Spruce Eats Ingredients For the Meatballs: 1 1/2 cups soft breadcrumbs, from about 3 slices bread 1 tablespoon minced dried onion, or 1/4 cup finely chopped onion 1 1/2 teaspoons salt 1/4 teaspoon freshly ground black pepper 1/4 teaspoon ground nutmeg, or allspice 3/4 cup milk 2 pounds ground beef 2 tablespoons unsalted butter 2 tablespoons vegetable oil For the Gravy: 2 tablespoons all-purpose flour 1 (10 1/2-ounce) can condensed beef broth 1 cup half-and-half, or light cream