Peel and cut the potatoes into coarse chunks. Rinse them and put them to boil until semi-done in salted water. In a deep pot, sauté the chopped onion and once soft, add the chopped peppers.
Sauté with a lid on, stirring often. When the peppers become soft, add the flour, stir and pour the tomato paste in with one quart of hot water. Allow to simmer for a while and add a pinch of sugar, savory, black pepper and paprika and a teaspoon of vinegar.
After them, add potatoes. Leave the potato stew to boil for about 10-15 minutes. Sprinkle with chopped parsley and remove from the fire.