uncooked bone-in beef short ribs (about 3 lbs.), trimmed of • kosher salt, divided • black pepper, divided 2 tablespoon olive oil, divid • onion, peeled, chopped • Marsala wine • beef broth • brown sugar • garlic, peeled, minced • fresh thyme, minced, divided • carrots, peeled, cut in 1-inch pieces • parsnips, peeled, cut in 1-inch pieces • pearl onions •