Vegetable stock is a flavorful liquid made by simmering a mixture of vegetables, herbs, and seasonings in water. It is commonly used as a base for soups, stews, sauces, and other dishes to enhance their flavor. Vegetable stock is a popular choice for vegetarians and vegans as it provides a rich and savory taste without using meat-based stocks. The vegetables used to make vegetable stock can vary but often include onions, carrots, celery, garlic, and herbs like thyme, parsley, and bay leaves. These ingredients are simmered together for a period of time to extract their flavors and create a flavorful broth.