Roasted fish with turmeric oil and cauliflower purée

Ingredients

• 4 firm white fish such as monk fish or hapuka
• 2 tablespoons olive oil
• 1/2 teaspoon turmeric powder
• 1/2 teaspoon ginger powder
• 1/2 teaspoon sea salt
• 1 teaspoon brown sugar
• 1 small cauliflower, chopped into florets
• 30 grams butter
• 2 tablespoons sour cream
• 100 grams baby spinach or kale
• 1/4 cup crispy shallots
• sea salt
• cracked pepper