Ingredients

• 1/2 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 4 (6-ounce) skinless salmon fillets
• 1/2 cup mayonnaise
• 1/4 cup dijon mustard
• 2 teaspoons chopped fresh oregano
• 2 teaspoons chopped fresh basil
• 2 teaspoons chopped fresh dill weed
• 2 teaspoons lemon zest
• 1 teaspoon chopped fresh thyme
• 1/2 cup crumbled feta cheese
• 1/2 (10-ounce) package frozen chopped spinach, thawed and drained
• 1 frozen puff pastry sheet, thawed
• 1 egg
• 1 tablespoon water
• lemon wedges