In a large pot, heat the oil.

Add the onions and sauté until soft and translucent.

Add the garlic and sauté until fragrant.

Add the rest of the vegetables, then add the water and spices.

Bring to a boil.

Lower the heat and allow to cook until all the vegetables are fork-tender, about one to one and a half hours. Remove from heat and allow to cool before blending with an immersion blender.

If adding barley, add two cups of water and the barley and bring to a boil.

Lower the heat and allow to simmer for an additional hour.