Put the potatoes, carrots, zucchini, artichoke hearts, leeks, tomatoes, turnip and celery in a large pot. Add the bouillon cube, olive oil and some salt and pepper. Cover with water. Bring to a boil and simmer until all the vegetables are tender, 20 to 30 minutes. Put the mixture through a food mill or blend with an immersion blender. Reheat to serve.
Per serving (2 cups per serving): Calories 101; Total Fat 2 grams; Saturated Fat 0 grams; Protein 3 grams; Total Carbohydrate 19 grams; Sugar: 5 grams; Fiber 3 grams; Cholesterol 0 milligrams; Sodium 283 milligrams