In a large bowl, combine mango, avocado, jalapeño, bell pepper, poblano, cilantro, lime zest, lime juice, garlic, and ½ teaspoon salt, stirring to combine well. Cover, and refrigerate for at least 1 hour.
Spray grill rack with nonstick, nonflammable cooking spray. Preheat grill to medium-high heat (350° to 400°).
Brush both sides of grouper fillets with olive oil, and sprinkle both sides of fish with remaining 1 teaspoon salt and pepper. Grill fish, covered with grill lid, for 3 to 4 minutes on each side, or just until fish begins to flake and is opaque in the center. Serve with mango salsa.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/grilled-grouper-with-mango-salsa/