• Place an oven rack in the lower 1/3 of the oven.
• Preheat to 400 degrees F.
• Line baking sheets with parchment paper.
• Using the tines of a fork, prick the top of the pastry all over.
  2 Sheets Puff Pastry
• Cover with parchment and place another baking sheet on top.
• Bake for 25 min (ours took 23 min) or until golden.
• Remove from pan and let cool.
• Preheat a grill pan and season both sides of chicken with Montreal chicken seasoning, salt and drizzle with olive oil.
  2 Chicken Breast, Kosher Salt, Olive Oil, 2 teaspoon Montreal Chicken Seasoning
• Grill until chicken is cooked through, about 5-6 min on each side.
• Set aside to rest.
• In a small bowl, mix together mayo and cayenne.
  3 Tablespoons Mayonnaise, 1/4 teaspoon Cayenne Pepper

To Assemble:

• Place pastry on a work surface.
• Slice each chicken breast diagonally into 6 (1/4 inch thin) slices.
• Place 3 slices of chicken on pastry and top with 1/4 of spinach.
  2 Cups Baby Spinach
• Place 1 avocado slice on top.
  1/2 Avocado
• Spread 1 teaspoon of mayo mixture on the underside of another piece of pastry to create the middle layer.
• Place on top.
• Repeat the layering with a pastry ending as the top.