Soak gelatine in cold water. Mix buttermilk, lemon juice and sugar. Squeeze the gelatine and dissolve at very low heat. Stir in 3 tablespoons of buttermilk. Then stir into the rest of the buttermilk.
Chill for 5-10 minutes until it begins to gel.
Whip the cream until stiff and fold into the buttermilk. Pour into cold rinsed round moulds or flat cups (approx. 200 ml each) and chill for at least 4 hours.
Stir the starch and 2 tablespoons of orange juice until smooth. Boil up the rest of the juice and thicken with the mixed starch. Simmer for about 1 minute. Let it cool down.
Roast the grated coconut in a pan without fat. Remove. Turn out the cream onto plates. Pour a little orange sauce. Sprinkle with coconut flakes. Add the rest of the sauce.