Cover the bottom of a large pot with olive oil. Sauté onions over medium heat until translucent. Add carrots and and cook for another 5 minutes. Add potatoes, garlic and a little more oil if necessary and continue to stir and cook for a few more minutes.
Add remaining vegetables, plus tomato sauce, water, dry herbs, and salt and pepper to taste.
Bring soup to a boil and then reduce heat, and simmer for 20 minutes, continuing to stir occasionally, being careful to not let bottom burn.
Add fresh tomatoes near end of cooking, and garnish with fresh parsley.
Recipe by iEatGreen at https://www.ieatgreen.com/recipe-rainbow-vegetable-soup/