This is yet another recipe I stole from Epicurious.com, although it was originally in Bon Appétit Magazine. It's super easy and an awesome summer meal.
1 Mango, peeled, cored and cut into 1/4 inch pieces
3/4 cup Red Onion, chopped
1 Red Bell Pepper, chopped
3 T Cilantro (or basil for all you cilantro haters!)
2 T Fresh Lime Juice
2 T Olive Oil
4 Tuna Steaks, 1 inch thick
Mix first five ingredients. Set aside.
Preheat grill or broiler. Brush tuna with olive oil and grill until opaque on both sides. Top with mango salad and serve.