Preheat oven to 180°C. Place the salmon in a baking dish and season with salt. Roast the salmon in the oven until cooked through, about 15 minutes. While the salmon is cooking, prepare the sauce.
Segment 1 Florida Grapefruit and set segments aside. Juice 1 Florida Grapefruit and set juice aside.
In a medium skillet pan, heat oil over medium heat. Add shallot and sauté until softened, about 2 minutes. Within the skillet, add ginger, Florida Grapefruit juice, honey, cayenne pepper and bring to a simmer.
Cook until sauce is reduced by about half, approximately 10 minutes. Add lemon juice and season with salt, to taste.
Immediately prior to serving, add the Florida Grapefruit segments and basil leaves into the sauce. Place cooked salmon onto a serving dish and spoon sauce over salmon before serving.