A Healing Bowl of Flavorful Italian Penicillin Soup

INGREDIENTS

3 tbsp olive oil
1 medium onion, finely chopped
4 cloves garlic, minced
2 carrots, diced
2 celery stalks, diced
1 medium potato, peeled and diced
1 zucchini, diced
1 cup chopped kale or spinach
6 cups vegetable or chicken broth
1 tsp dried thyme
1 tsp dried rosemary
1 bay leaf
Salt and pepper, to taste
Juice of 1 lemon
Fresh parsley, chopped for garnish
Optional: grated Parmesan cheese