For the salsa: Combine the mangoes, sweet peppers, green onions, Key lime juice, cilantro, jalapeno, garlic and salt in a medium bowl and toss gently. Let stand for 30 minutes at room temperature (place in the fridge if it will be longer).
For the fish: Combine the olive oil, Key lime juice and garlic in a large, shallow glass baking dish, stirring with a whisk. Add the fish to the juice mixture and turn to coat. Cover and let stand 15 minutes.
Coat the grates of a grill with nonstick grill spray and prepare the grill for medium-high heat.
Remove the fish from the marinade and discard the marinade. Sprinkle the fish evenly with the salt and black pepper. Grill to desired doneness, about 3 minutes per side. Serve the fish with the salsa.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Key Largo Conch House, Key Largo, Florida