To prepare the marinade: Combine honey, grape seed oil, soy sauce, and white wine vinegar. Cover the fish with the marinade, cover and refrigerate for 24 hours. Remove the fish and place in a pan. Caramelize the fish under the broiler and finish in a preheated 400 degree F oven until the fish reaches medium. Reserve some of the marinade to use for sauce.
To prepare the spinach: Heat the butter in a hot saute pan. When the butter begins to brown, add the garlic. Add the spinach. Cook until tender. Season with nutmeg, salt, and pepper, to taste. Set aside.
Heat reserve marinade to boiling point, reduce heat and simmer for two to three minutes.
To assemble the plate: In the center of each of 6 large bowls divide the spinach. Place a portion of fish on top and pour approximately 2 tablespoons of reserved marinade, over the top of each fish.