Quince, burnt tahini custard with blackberry vinegar snow (Ray Capaldi)

Name: Quince, burnt tahini custard with blackberry vinegar snow (Ray Capaldi)
Prep time: 20 min
Cook time: 4 h 25 min
Total time: 4 h 25 min
Yield: 8 portions
Ingredients: 5 gelatine leaves; 180 g water; 40 g apple cider vinegar; 60 g sugar; 250 g fresh blackberries; 500 g thickened cream; 100 g honey; 6 egg yolks; 60 g tahini; 5 gelatine leaves; water; 850 g water; 150 g red wine; 400 g caster sugar; 1 lemon; 3 star anise; 2 cinnamon quills; 2 whole cloves; 2 dried bay leaves; 2 whole black peppercorns; 2 quinces