Peel the potatoes and cut them into small pieces, then fry, on a low heat.
Once cooked, drain the potatoes.
Make the tomato sauce: Add a spoon of oil to the pan and then fry the deseeded and peeled tomatoes, smashing it. When cooked, add a few drops of vinegar, a teaspoon of flour and another teaspoon of spicy ground pepper and stir well to mix everything. Season and pour over the potatoes.