Air Fryer Salmon Fish Sandwich

Bahan-bahan (4 porsi)

• 6 tbsp mayonnaise (I like Sir Kensington)
• 2 tablespoons drained capers (minced)
• 2 teaspoons fresh lemon juice
• 16 ounces skinless salmon fillet (if frozen thawed, cut in 4 pieces)
• 1 teaspoon kosher salt (divided)
• 2 large egg whites (lightly beaten)
• 1 cup seasoned panko* (or gluten free panko)
• Olive oil spray
• 4 whole wheat buns (or gluten free buns)
• 4 butter lettuce leaves