One Pot Philly Cheesesteak Pasta

olive oil, divided

unsalted butter, divided

lbs boneless ribeye steak, excess outer fat trimmed, sliced into thin slices

cremini (or baby portobello) mushrooms, sliced

large yellow onion, cut in half, then sliced thinly

green bell pepper, seeds and ribs removed, then thinly sliced

dried thyme

dried cavatappi pasta (or other short cut)

beef stock

water

sour cream

cream cheese

slices provolone cheese, chopped, divided

salt and black pepper,

minced fresh parsley, for garnish