Reserve 1/3 cup pizza sauce; cover and refrigerate. In a mixing bowl combine remaining pizza sauce and egg. Stir in onion, green pepper, bread crumbs, garlic salt, and black pepper. Add ground beef and mix well.
Fold meat mixture into a loaf and place on 3 foil handles. Transfer loaf to any size crockpot. Cover and cook 8 to 10 hours on LOW or 4 to 6 hours on HIGH.
To ensure doneness insear meat thermometer into center of loaf and internal temperature should read 170 degrees F.
Spread loaf with reserve 1/3 cup pizza sauce. Sprinkle with mozzarella cheese. Cover and let cook 15 minutes more or until cheese is melted.
Using foil strips, lift loaf from crockpot and transfer to a serving plate. Discard foil strips.
Serves 8.
Foil handles:Tear off three 20x3 inch strips of heavy foil or use regular foil folded to double thickness. Crisscross the foil strips in a spoke design.
Place the foil handles on a large sheet of waxed paper. Place the meat loaf on the spoke design. Lift the ends of the handles to transfer the loaf to the crockpot.
When ready to serve, simple lift the foil handles from the crockpot and remove the meal to a serving dish.