Ingredients:

• For the fish:
• 1/4 cup extra-virgin olive oil
• 2 lemons, zested
• 4 (6-ounce) white fish filets (such as halibut or cod), skin removed if desired
• Kosher salt, to tast
• Black pepper, to taste
• For the gremolata:
• 1 large bunch parsley (leaves and tender stems)
• 2 cloves garlic
• 2 heaping tablespoons crushed Calabrian chiles
• 1/2 cup plus 3 tablespoons extra-virgin olive oil
• 1 teaspoon red wine vinegar
• 1 1/2 teaspoons kosher salt
• Black pepper, to taste
• To finish:
• Parsley leaves
• Flaky salt, to taste