Peel and finely chop the ginger. Mix with the grated coconut and a tablespoon of sugar. Wash one lemon, cut into slices. Line a greased casserole dish with it. Wash the apples, cut out the core. Place the apples on the lemon slices. Pour the coconut mixture into the apples.
Squeeze the rest of the lemon. Drip juice over the apples. Cover and cook in the preheated oven (electric cooker: 175 °C/ gas: level 2) for 25 to 30 minutes. Meanwhile, bring milk with vanilla pulp and remaining sugar to the boil for the sauce. Stir cornflour and two tablespoons of water until smooth and stir into the milk. Bring to the boil again. Refine with crème fraîche and vanilla flavour