Peel the onion and garlic cloves.
Wash the carrots, zucchini, and potatoes. Peel them if desired.
Cut the prepared onion, garlic, carrots, zucchini, and potatoes into large chunks.
Place the vegetable chunks into a pot.
Cover the vegetables with water and add a pinch of salt.
Bring the water to a boil, then reduce heat and simmer until all the vegetables are tender when pierced with a fork.