Chicken Pot Pie

INGREDIENTS

sheet frozen puff pastry

4 tbsp

butter

1/4 cup

chopped onion

1/4 cup

chopped celery

1/4 cup

chopped carrot

1/4 tsp

salt

2 tbsp

flour

2 cups

milk

1/2 cup

heavy cream

1 tsp

"Better Than Bullion" chicken base

2 cups

cooked chicken, chopped

1/2 cup

frozen peas

1/2 tsp

chopped fresh thyme, plus more for garnish if desired

egg, beaten slightly with a fork