Or bake in 400 F oven for 45-60 minutes. Meanwhile, place chopped tomatoes and ketchup in a medium bowl. Stir topping into tomato and ketchup mixture. Remove potatoes from microwave or oven using a hot mitt or pad. Place on a plate and allow to cool until comfortable to touch.
Slice lengthwise down center.
Spoon prepared topping into potatoes. Sprinkle each potato with 2 tablespoons mozzarella cheese and return potatoes to microwave. Heat on HIGH 1 minute or until cheese melts. For extra fun, make all three toppings and have a Spud Stuffer buffet. The tomatillo, used in salsas, means little tomato .