[header] How to cook grouper [title] Prepare the grouper fillets by either marinating for 1 to 2 hours before cooking or coating the fish in your favorite seasonings. [title] Grill the grouper fillets on a grill. [substeps] Preheat the grill to medium heat and coat it with oil or nonstick cooking spray so the fish does not stick. 
Grill the grouper fillets for approximately 5 minutes per side or until they flake with a fork. [title] Fry the grouper fillets on the oven.