Combine the diced tomatoes, rocket leaves, olive oil, shallots, garlic, lemon juice and zest, capers and olives in a mixing bowl and toss well. Season to taste with salt and pepper if desired. Set aside. (The acidic ingredients will wilt the rocket leaves). Preheat a grill pan or griller and season the salmon with salt and pepper. Place the salmon fillets in the griller or grill pan and cook over a high heat until the fish is well seared, about 4 minutes. Turn the fish carefully and cook the other side for 1 minute. Transfer the fish to warmed plates and spoon over the rocket salsa. Garnish with lemon wedges. Per serving: 1988 Calories (kcal); 146g Total Fat; (66% calories from fat); 140g Protein; 28g Carbohydrate; 354mg Cholesterol; 1295mg Sodium Food Exchanges: 0 Grain(Starch); 19 Lean Meat; 5 Vegetable; 0 Fruit; 24 1/2 Fat; 0 Other Carbohydrates Converted by MM_Buster v2.0n.