Stuffed Baked Potato

Name: Stuffed Baked Potato
Ingredients: 4 large potatoes, scrubbed clean; 1 cup shredded mozzarella or kaşar cheese (a mild Turkish cheese); 1/4 cup butter; Salt and black pepper, to taste; Toppings (customizable); 1/2 cup diced pickled red cabbage; 1/2 cup sweet corn, drained; 1/2 cup diced green and red bell peppers; 1/2 cup sliced green olives; 1/2 cup boiled peas and carrots, diced; 1/2 cup diced Turkish sausage (sucuk) or salami (optional); 1/4 cup mayonnaise and ketchup, for drizzling