Chicken Florentine Wrapped in Pastry - Puff Pastry

Ingredients

• 1 egg
• 1 tablespoon water
• 1/2 pound skinless, boneless chicken breast halves(about 2 breast halves)
• 1/3 cup all-purpose flour
• 3 tablespoons olive oil
• 1 package (about 10 ounces) frozen chopped spinach, thawed and well drained
• 1 teaspoon ground nutmeg
• 1 package (17.3 ounces) Pepperidge Farm® Puff Pastry Sheets, thawed
• 4 teaspoons Dijon-style mustard