Put chicken breasts and stock cube in a saucepan. Add boiling water to cover Poach for 7 minutes and then cover and turn off heat. Take sweetcorn out to defrost Cube bacon and fry until crispy in a frying pan Remove and keep bacon oil Add butter and gently saute onions Add generous grinds of pepper and nutmeg Stir in flour and allow to cook briefly Add milk and cook gently until it makes a thick sauce Add mustard and cook until thick and creamy, add all other ingredients and add milk until all binded by a thick sauce. Brush pastry with butter and make three layer sin a pie dish, brushing each layer with melted butter Cook for 20 mins or until crispy Alternatives instead of sweetcorn: Mushroom, leeks