Temia

1. Mix the tuna, onion, scallion, parsley, mayonaisse, and a few drops of tobasco in a bowl. Season with salt and pepper and set aside. 2. To prepare the ketchup: heat the olive oil in a saucepan over medium-high heat and saute the garlic and onion until soft but not browned, about 2 to 3 minutes, stirring frequently. Add the tomatoes, tomato puree, sugar and vinegar. Cook over low heat until thickened, about 3 to 5 minutes. Season the ketchup with salt and pepper. Press the sauce through a fine sieve and leave to cool. 3. Butter each slice of bread on one side and turn over. Pile the tuna mixture on to the non buttered sides of two slices of bread and top with cheddar cheese. Cover with the other 2 slices of bread, buttered side up. 4. Bake the toasted sandwiches for 2 to 3 minutes on each side in a dry frying pan over medium heat until the bread is crunchy and the cheese has melted. 5. Cut the tuna melt diagonally and serve with the ketchup.