Chicken and leek parcels | Women's Weekly Food

Ingredients

• 25 gram butter
• 1 small leek, pale section only, thinly sliced
• 1 tablespoon plain flour
• 3/4 cup milk
• 1 teaspoon wholegrain mustard
• 4 sheets filo pastry
• cooking oil spray
• 2 cooked chicken breast fillets, skin-on
• 1 teaspoon cumin seeds
• salad leaves, to serve