Gather vegetables such as carrots, celery, onions, potatoes, tomatoes, and leafy greens
Wash and peel the vegetables if needed
Chop the vegetables into small, even pieces
Heat oil or butter in a pot
Add onions and cook until softened
Add the remaining vegetables and stir for a few minutes
Pour in water or vegetable broth
Add salt, pepper, and any desired herbs or spices
Bring the soup to a boil
Reduce the heat and simmer until the vegetables are tender
Taste and adjust seasoning
Serve hot