To prepare a connies sweet and sour christmas meatballs recipe, you'll need: 1 pound ground sirloin, 2 tablespoons kosher salt, 1 teaspoon thyme, 1/4 teaspoon ground nutmeg, 1/2 teaspoon each ground cinnamon and ground allspice, and 1 tablespoon dried cranberries. Preheat the oven to 375 degrees F (190 degrees C) and grease 2 large roasting pans with cooking spray. Cut the meat into 1-inch (2.54-centimeters) thick slices. Place the cut side down on the baking pan. Bake for 20 to 25 minutes, or until meat is no longer pink. Remove from oven and let stand for 5 minutes before serving.