1. Step
Heat oil in a multicooker using the Saute setting. Add onion and celery; cook, stirring occasionally, until softened, 3 to 5 minutes. (Adjust temperature as necessary by pressing the Saute button for more or less heat.) Add garlic and cook, stirring, for 30 seconds. Add barley and stir to coat. Add broth, chicken, carrots, and parsnips.