Peel the potatoes and boil with a little salt. Coarsely chopped onions fry for 1-2 minutes. Add basil, tomatoes and sugar. The olives are finely chopped. Once the potatoes are ready, Strain and then them add salt and 1 tbsp sunflower oil (olive oil). In a buttered and sprinkled with bread crumbs tray be arranged in the following sequence: Spread half of the mashed potato, onion mixture and chopped cucumbers, olives and chopped in large pieces cheese, remaining mashed potatoes. Bake in a moderate oven, then we can sprinkle with grated cheese. Optional between the layers can be added sausage.