Beef, Cheddar and Potato Pie

lbs Ground beef

cut into 4-inch cubes 2 stalks celery

Baking potato, peeled and cut into 1/4-inch cubes, large

Carrots, cut into 1/4-inch cubes

large clove Garlic

Onion, cut into 1/4-inch cubes, large

Egg yolk, large

Salt and pepper

sheet Puff pastry, frozen

Cheddar cheese, sharp

Beer, dark