Shrimp with White Chocolate Sauce and Mashed Cauliflower

Ингредиенты

• 4 cups (1 litre) cauliflower, cut into florets
• 1/2 onion, finely chopped 

• 2 cups (500 ml) milk
• 2 tablespoons (30 ml) butter
• Salt and pepper
• 1/4 cup (60 ml) finely chopped onion
• 1/3 cup (75 ml) butter
• 1 clove garlic, finely chopped 

• 1 slice fresh ginger, about 1/4-inch (1/2-cm) thick
• 1/2 cup (125 ml) apple cider
• 3/4 lb (350 g) large shrimp (about 18)
• 1/2 oz (15 g) white chocolate, chopped