Clean the pineapple, cut into slices and cut out the hard stalk. Grill the pineapple slices on the preheated grill for 4-6 minutes while turning. Mix egg yolks, egg and sugar in a metal bowl over a hot water bath until creamy.
Add the wine and lemon juice and beat vigorously with a whisk until the cream becomes frothy and has at least twice the volume. Sprinkle pineapple with roasted grated coconut and possibly chips.
Serve with zabaglione on plates. Add the rest of the zabaglione.