Fried Fish with Pickled Jalapeño Mayonnaise | America's Test Kitchen

Ingredients

• 1/2 cup mayonnaise
• 2 tablespoons chopped pickled jalapeño chiles
• 6 tablespoons chopped scallions
• 2 teaspoons lime juice
• 1 1/2 cups plain bread crumbs
• 2 large egg whites
• 4 skinless trout, catfish, or flounder fillets (5 to 7 ounces each)
• 5 tablespoons olive oil
• 3 tablespoons unsalted butter, cut into 2 pieces
• Lime wedges for serving