Here is a good quick one that is simple, not ingredient intensive, and makes a good sandwich. Cover with Ketchup or BBQ sauce before baking.
Cheesy Meatloaf
1 lb ground beef
1 lb ground pork (not sausage)
1 envelope Dry Onion Soup Mix
2 eggs beaten
2 slices bread crumbled
ground black pepper to taste
3/4 cup water
2 cups shredded mozzarella cheese, divided
Preheat oven to 350 F. In a large bowl, combine water, soup mix, pepper, beaten eggs, and bread crumbs. Mix well and add meat. Add 1/2 cup of cheese and stir in.
In a 9x5 loaf pan, spread half of meat mixture on bottom layer. Add remaining 1 1/2 cup of cheese to middle and cover with remaining meat mixture. Top with ketchup or BBQ if desired.
Bake 60 minutes or till center reaches 170F. Remove and let cool 15 minutes before serving.