Chicken Pot Pie | Whiskn'roll

Ingredients

• 1 shallot
• 1 garlic clove
• 1 big celery stick
• 2 carrots
• 100 g button mushrooms
• 3 tbsp unsalted butter
• ⅓ cup all purpose flour
• 1 cup homemade chicken stock
• 2 cups low fat milk
• 2 cups boiled chicken breast, cut into bite size pieces
• 1 cup frozen peas
• 2 cups baby spinach leaves
• Juice of 1 lemon
• Salt to taste
• Black pepper to taste
• ½ tsp ground nutmeg
• 1 ½ tbsp dried Zaatar leaves or Herbes de Provence
• 250 g puff pastry sheet, completely thawed
• 1 egg, beaten
• Seasoned flaky salt for finishing (optional)
• Rosemary sprigs for garnish