Marinate the skinless duck leg in a marinade of olive oil, white wine, garlic, salt, pepper and thyme.
Cut the pineapple into rings, put the marinated duck leg and pineapple wheel in the grill and cook for 15 minutes.
Prepare grapefruit and apple, cut into slices. We chop the nuts.
Serve: Put the sliced apple and pineapple on the pineapple wheel. Drizzle duck leg with unagi sauce and sprinkle with nuts.