Chicken Florentine Wrapped In Pastry

• 19 1/4 sheets
• 2 chicken (skinless boneless)
• 1 egg
• 40 gr all-purpose flour salt pepper
• 45 ml olive oil
• 20 ml dijon-style mustard
• 16 ml water
• 2 gr nutmeg (ground)
• 1 package pepperidge farm puff pastry (frozen)
• 1 package spinach (frozen chopped thawed)