1. 1. Preheat the grill to medium-high heat.

2. 2. Season the tuna steaks with salt and pepper on both sides.

3. 3. Place the tuna steaks on the grill and cook for 4-5 minutes per side, or until desired doneness is reached.

4. 4. In a small bowl, mix the tomato paste with a pinch of salt and pepper to taste.

5. 5. Once the tuna steaks are cooked, remove them from the grill and top each steak with a generous spoonful of the tomato paste mixture.

6. 6. Serve hot and enjoy!