large egg
plain dried bread crumbs
Worcestershire sauce
garlic powder
(or more) kosher salt
onion powder
freshly ground black pepper
ground beef
plus 1 tsp. neutral oil
crimini mushrooms, scrubbed, thinly sliced
kosher salt, divided
unsalted butter
yellow onion, chopped
sprigs fresh thyme
all-purpose flour
tomato paste
red wine, such as Cabernet Sauvignon
low-sodium chicken stock
Worchestershire sauce