Skate wing

Name: Skate wing (Cauliflower and grapefruit)
Yield: Makes 6
Ingredients: 5 salty fingers; 1 quenelle Royal Oscietra caviar; ½ golden cauliflower; Vanilla pod, cut in half; 1 g chives; Kosher salt & pepper; 2 x 500g skate wing (6 portions); Active charcoal powder; 1 lemon, zested; 100 ml cream; ½ purple cauliflower; Romanesco florets; Olive oil; 5 g sugar ester; 50 ml olive oil; 150 ml fresh pink grapefruit juice; 50 ml extra virgin olive oil; ½ white cauliflower; 1 L milk; 50 ml stock syrup