Wash and scrub the Potato (3). Pierce them on the sides with a fork so that they will cook nicely. Pop them on a baking tray. Spray them with Nonstick Cooking Spray (to taste) and ligthly season them wtih Salt (to taste). Put them into the oven at 190 degrees C (375 degrees F) for an hour.
Cut the baked potatoes in half lengthwise. Using the spoon, scoop out the insides into a bowl.
Add Margarine (1 teaspoon) to the bowl, and mix them together. Add Ham (1/4 cup) and Pineapple (1/4 cup), and mix them in. Take scoopfuls of the mixture and put them back into the potatoes.
Top the potatoes with Cheese (1/2 cup). Put them back into the oven at 200 degrees C (400 degrees F) for fifteen minutes. Take out and serve.