The primary ingredient of vegetable soup is vegetables, naturally. A variety of vegetables can be used, depending on seasonal availability and personal preference. Common choices include carrots, celery, onions, potatoes, tomatoes, and greens like spinach or kale. The vegetables are usually cooked in a flavorful broth, which is enhanced with herbs and spices like thyme, bay leaves, or garlic. Vegetable soup can be made with different bases, including vegetable or chicken broth, and can vary widely in texture, from chunky to smooth purées. This nutritious dish is beloved for its warmth, flavor, and health benefits.