Wash and chop your vegetables
Heat oil or butter in a pot
Add onions, garlic, or other aromatics if desired
Add the chopped vegetables
Stir for a few minutes
Pour in water or vegetable broth
Add salt, pepper, and any seasonings
Bring to a boil
Reduce heat and simmer until vegetables are tender
Blend the soup if you want a smooth texture
Taste and adjust seasoning
Serve hot