Steak and Guinness Pie

1kg steak, diced
1 cup mushrooms, diced
2 small onions, sliced
2 cloves garlic, crushed
1 Tbs oil
1/3 cup plain flour
200ml Guinness
1 cup beef stock
Ready-rolled puff pastry
1 egg, beaten

Brown steak in oil and set aside. Cook onions and garlic, add mushrooms. Sprinkle in flour and cook for 1min. Return meet and juices to pan, add Guinness and beef stock. Bring to boil. Reduce heat, simmer for 2hrs until tender and sauce has thickened. Spoon beef mixture into pastry lined pie dish. Cover with more pastry pressing sides. Decorate with pastry shamrock. Brush with egg. 25mins 200C.