Arrange a slice of prosciutto on each serving plate. Break up the tuna into small pieces and scatter over the prosciutto.
Mix the mayonnaise and fennel and spoon over the top. Scatter with the olives and capsicum and serve at once.
Per serving: 3210 Calories (kcal); 216g Total Fat; (60% calories from fat); 304g Protein; 12g Carbohydrate; 766mg Cholesterol; 25870mg Sodium Food Exchanges: 1/2 Grain(Starch); 43 Lean Meat; 0 Vegetable; 0 Fruit; 11 1/2 Fat; 0 Other Carbohydrates