Skate wing

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