Tasty Chicken & Mushroom Pie – Moy Park Chicken

Ingredients

• 4 skinless Moy Park chicken breasts
• Knob of butter
• Bunch of spring onions
• 150g button mushrooms
• 1 heaped tbsp of plain flour, plus extra for dusting
• 2 tsp English mustard
• 1 heaped tbsp crème fraîche
• 300ml chicken stock (organic if possible)
• Few sprigs of fresh thyme
• 1/3 of a nutmeg (for grating)
• 1 sheet of pre-rolled puff pastry
• 1 egg