1/2 cup no-salt-added or low-sodium vegetable broth (see note)
1 large onion, chopped
2 garlic cloves, chopped
2 large portobello mushroom caps, thinly sliced
1 large tomato, diced, or 8 halved cherry tomatoes
1 1/2 cups cooked or 1 (15 ounce can) no-salt-added or low-sodium garbanzo beans, drained