• 2 round lettuces
• 8 oz (225 g) tuna fish
• 2 oz (56 g) breadcrumbs
• 1 tablespoon chopped parsley
• 8 black olives, pitted and chopped
• 1 tablespoon lemon juice
• 1 clove of garlic
• Salt and pepper

Method:

1. Preheat the oven to Gas Mark 4 (350°F/180°C).
2. Keeping them whole, wash and dry the lettuces.
3. In a mixing bowl, flake the tuna fish, add the breadcumbs, chopped parsley and the pitted and chopped olives. Stir in the lemon juice, crushed garlic clove and salt and pepper. Mix well.
4. Spread open the centre of the lettuces and spoon in the stuffing.
5. Put 5 tablespoons of water into a casserole and then put in the stuffed lettuces.
6. Cover the casserole and bake for 15 minutes.
7. Serve immediately.