Boil the potatoes in pressure cooker for 2 whistles or until they are cooked almost 3/4th. Cool the potatoes and peel off the skin and cut into 3, one (1) inch slices on the lengthier side. Cut thin slice on the edge slices so that they have a flat bottom.
Preheat the oven for about 400F.
In a bowl mix 3/4 tbsp olive oil, salt and pepper. Whisk it well. Spread this mixture on the potatoes so that they coat well and arrange them on a baking sheet and bake them for about 10 mins.
Meanwhile, in a bowl add the chopped onions, chopped bell peppers, capers, salt, pepper and parsley, crushed red pepper flakes and remaining olive oil and mix them well. (you can add any toppings of your choice....like creating your own pizza)
Take the potatoes out of the oven, spread the pasta sauce evenly on top of the potatoes, place the mixed veggies on top so that it covers all the pasta sauce,
Add some Fontana/mozzarella cheese on top and sprinkle with Parmesan cheese and pop this into oven for more 5-7 mins or until the cheese it melted.
Enjoy the yummy pizza without all the fat and meat!