Salsa without fennel buns water

1 tablespoon olive oil 2 -3 lbs stewing beef , cut into 1 1/2-inch chunks (I've used both rump roast and chuck) 1/2 cup chopped onion 2 tablespoons taco[...]

1 (2 -3 lb) boneless beef shoulder or 1 (2 lb) rump roast (I used chuck) 1 tablespoon oil 1 cup mild salsa 2 tablespoons brown sugar 1 tablespoon soy sauce 1[...]