Grouper: Preheat oven to 400 degrees F. Rub each fillet with olive oil and season with salt and pepper to taste. Wrap each fillet in a banana leaf, envelope style and place seam sided down on a baking sheet. Roast for 8 to 10 minutes. Place the packets seam side up on a platter and fold back the sides of the banana leaf to expose the fish. Place a few tablespoons of the relish on top and garnish with mint, cilantro and peppers.
Red Beans and Rice: Heat oil in a large Dutch oven. Add the onions, celery, garlic and green onions and cook until soft. Add the soaked beans, ham bone, bay leaf, thyme, red pepper and 3 cups of cold water. Bring to a boil, reduce to a simmer and cook for 1 1/2 hours or until the beans are soft. Season with salt and pepper. Place rice in a large bowl and add the bean mixture. Mix to combine and fold in cilantro.
Combine all ingredients in a medium bowl and let sit at room temperature for 30 minutes before serving.