Instant Pot Beef Barley and Mushroom Soup

olive oil

stewing beef, cut into 1-inch cubes

large onion, chopped

garlic cloves, minced

cremini mushrooms (8 oz), sliced

balsamic vinegar (or worcestershire sauce)

red or white baby potatoes, chopped

carrots (8 oz), chopped

celery ribs (4½ oz), chopped

dry pearl barley, rinsed

dried rosemary

dried thyme

beef broth (low sodium)

water

Salt and pepper,

Optional: fresh basil as topping