Grilled Flatfish With Pistachio-Herb Sauce Recipe

Ingredients

• ¼ cup raw pistachios
• 10 prunes, pits removed, coarsely chopped
• 1 garlic clove, finely grated
• 2 cups finely chopped parsley
• 1 cup finely chopped mint
• ¼ cup finely chopped tarragon
• ¼ cup kimchi or sauerkraut brine
• 2 Tbsp. Champagne vinegar or white wine vinegar
• Kosher salt
• ¾ cup extra-virgin olive oil
• 1 (2–4-lb.) flatfish (such as sole, flounder, or turbot)
• Extra-virgin olive oil
• Aleppo-style pepper