Smothered Pork Roast with Rice

boneless pork roast (shoulder or butt)

Kosher salt and freshly cracked black pepper

canola oil

onions , halved and sliced thin

garlic , cut into thin slices

dried thyme , crushed

dried rosemary , crushed

unsalted butter

all purpose flour

( 32 ounce ) carton of chicken broth

Perfect boiled rice