Lightly grease 23cm pie dish.
Heat butter in pan.
Add bacon, green onions and garlic and cook while stirring, until the bacon is crisp.
Add flour and stir until combined.
Gradually stir in milk and stir over heat until mixture boils and thickens
and finally cools.
Add chicken, cheese and eggs.
Cover pastry with a damp cloth to prevent drying out whilst working.
Layer 2 sheets of pastry together, painting each with a little melted butter.
Fold each in half lengthways and lay across the bottom of the dish with the edges overhanging. Repeat with another 6 sheets, overlapping the strips clockwise around the dish until it is covered.
Place a spoon chicken mixture into dish and fold the overhanging edges back up and over the chicken and brush all over with extra melted butter.
Brush the final 2 sheets with melted butter and fold in half widthways.
Place pastry on top of pie and trim edges. Brush lightly with more butter and bake in a moderate oven (180 degrees C) for about 35 minutes or until browned and heated through.
Cover top with foil if pie begins to overcook.