Salt-Baked Fish with Hibiscus Beurre Blanc | Saveur

Ingredients

• 10 ¹⁄₂ cups (6 lb. 10 oz.) coarse sea salt
• 3 large egg whites
• 1 3-lb. sea bass, gutted with scales
• 3 medium shallots (6 oz.), finely chopped
• 1 tbsp. white wine vinegar, plus more as needed
• ¹⁄₂ cup dry white wine
• 14 tbsp. (7 oz.) cold unsalted butter, cut into small cubes
• 1 tbsp. plus 1 tsp. hibiscus powder
• Kosher salt
• Boiled new potatoes, for serving