A delicious meal to make ahead of time, and save for a day when you are short on time. Just pop it in the oven and in no time you have a homecooked meal.
Heat the oven to 350º. In a skillet, sauté the onion, celery, garlic, and parsley in the oil over moderate heat until softened but not browned. With a slotted spoon, transfer the vegetables to a large bowl.
Add all remaining ingredients, except cheese, to the vegetables. Mix well with your hands.
Transfer half the mixture to a 9- by 5-inch loaf pan. Place mozzarella slices on top, then cover with the rest of the meat mixture. 4. Bake for 75 to 80 minutes or until a meat thermometer reads 170º. Cool and chill. Wrap tightly in freezer foil. Place in a resealable plastic freezer bag. Label and freeze. To serve: After thawing and unwrapping, bake in a covered pan at 400º for 20 to 30 minutes. Serves 5 to 6.