Family chicken pie

Ingredients

• 2 sheets frozen shortcrust pastry
• 60 gram butter
• 1 leek, thinly sliced
• 200 gram button mushrooms, thinly sliced
• 2 garlic cloves, crushed
• 2 tablespoon plain flour
• 420 gram can creamy chicken soup
• 1/2 cup chicken stock
• 1 rotisserie chicken, bones and skin removed, cut into thick slices
• 1 cup mixed frozen vegetables
• 2 sheets puff pastry
• 1 egg, whisked
• 2 teaspoon sesame seeds
• leafy green salad, mashed potato to serve