Directions

1. Preheat oven to 425°F. Lightly coat shallow baking dish with nonstick cooking spray. Place fillets in baking dish.
2. Combine 2 tablespoons of the lemon juice, 2 tablespoons of the olive oil, 2 tablespoons of the capers, 1/4 teaspoon of the salt and pepper; pour over tuna pieces. Bake 15 to 20 minutes or until fish flakes with fork.
3. Meanwhile, combine tomatoes, arugula, garlic, parsley, remaining 2 tablespoons lemon juice, remaining 2 tablespoons olive oil, remaining 2 tablespoons capers and remaining 1/4 teaspoon salt in food processor bowl; cover and process.
4. Serve tuna on hard crackers, if desired. Top with tomato mixture.