We often have roast beef left over. Cut your left over roast beef into smaller size. Prepare ready made gravy. Fry some thinly sliced onion if you like. If you want to add some vegetables, you can add some fresh carrots or peas, but make sure you boil them first so they are cooked. Or if you are lazy, pop some frozen vegetables into the microwave to get them ready.Defrost some ready made puff pastry. Line them inside pie dish. This can be the individual small one or the big shared one.
Combine the roast beef, onions, vegetables and gravy inside puff pastry. Then cover the top of the pie. Bake according to the pastry direction and you've got yourself a healthy beef pie.
