Lemon Crumb Fillet of Sole

Bahan-bahan (4 porsi)

• 4 slices white bread or french bread
• 2 teaspoons grated lemon zest
• 2 tablespoons whole grain Dijon mustard
• 1 tablespoon freshly squeezed lemon juice
• Four 6-ounce sole fillets
• ½ teaspoon kosher salt
• ½ teaspoon freshly ground black pepper
• 4 lemon wedges, (for serving (optional))