500g or about 1 lb of white button mushrooms500g or about 1 lb of potatoesOlive oil for fryingFine sea saltHandful of fresh parsley, choppedSauce:340g or 3/4 lb of Italian crushed tomatoes1 teaspoon of sherry vinegar3 cloves of garlic, grated1 teaspoon of paprika1 or 2 teaspoons of SrirachaSalt (to taste)