Vegetable Barley Soup

Heat oil in a large heavy pot over medium-high heat. Add mushrooms, onion and garlic; cook, stirring occasionally, until the mushrooms are lightly browned and the onion is translucent, about 7 minutes. Add carrots, fennel seeds and oregano; cook, stirring constantly, until fragrant, about 1 minute. Add tomatoes, broth, barley, salt and pepper. Bring to a boil over high heat.

Reduce heat to medium to maintain a simmer; cook, stirring occasionally, until the barley is tender, about 40 minutes. Stir in green beans and peas; cook over medium heat until heated through, about 2 minutes. Remove from heat; stir in vinegar. Garnish with parsley and basil, if desired.