Hearty Beef Puff Pie

ground chuck

carrots, cut into ¼ inch cubes

large onion, cut into ¼ inch cubes

stalks celery, sliced

large garlic cloves, minced

large baking potato, peeled & cut into ¼ inch cubes

dark beer, like Guinness (the alcohol cooks out, and it gives this such a delicious flavor. If you wish to not add beer, use ¼ cup beef broth & ¼ cup steak sauce…but the beer will produce a tastier result)

sharp cheddar cheese, shredded

salt & pepper (to taste)

sheets frozen puff pastry, thawed but cold

large egg yolk + 1 tablespoon water