Mini Chicken Pot Pies

For the filling:

vegetable oil

boneless skinless chicken breasts, cut into bite size pieces

medium onion, chopped

low sodium chicken broth

frozen peas and carrots

kosher salt

freshly ground black pepper

ground thyme

shredded Cheddar cheese (about 4 ounces)

For the "crust":

baking mix (such as Bisquick)

whole milk

large eggs