Preparing the tuna: Place the tuna cubes in a bowl.
Mixing the ingredients: In the bowl containing the tuna, add the coconut milk, lime zest, lime juice and coriander. Season with salt and pepper to taste. Mix gently to coat the tuna with all the ingredients.
Serving: Serve the tuna tartare very fresh, accompanied by fried plantain slices for a crispy texture. You can also serve it with a cabbage salad for a touch of freshness.