Mushroom Stout Skillet Chicken Pot Pie (with Vegan Option)

(26g)olive oil

sweet white onion, diced

ribs celery (52g), chopped

large carrot (63g), peeled and chopped

wt oz crimini mushrooms, sliced

corn kernels (fresh or frozen)

lbs boneless, skinless chicken thighs, cut into cubes (for vegan, see note)

rosemary, minced

sage leaves, minced

salt

black pepper

flour

stout

chicken broth (or vegetable broth for vegan)

sheet puff pastry, thawed

egg wash (1 large egg, 1 tablespoon water, beaten) (for vegan, see note)