Chicken Pot Pie with Biscuits

INGREDIENTS

1/4 cup

unsalted butter

yellow onion, chopped (1 1/2 cups)

carrots, chopped small (2 cups)

ribs celery, chopped small

2 cloves

garlic, minced

1 tsp

dried thyme

1/4 tsp

salt

1/4 tsp

pepper

1/3 cup

flour

1 3/4 cups

low sodium chicken broth

1 cup

milk

2 cups

shredded or chopped cooked chicken (I use rotisserie chicken)

1 cup

frozen peas

2 cups

flour (I used 1 cup of all purpose plus 1 cup of white whole wheat)

1 tbsp

baking powder

1/2 tsp

salt

5 tbsp

cold unsalted butter, cut into small cubes

3/4 cup

whole milk, plus more for brushing