In a large stockpot, heat the olive oil over medium-high heat. Add the onions and cook until softened, about 3 minutes. Add the garlic, zucchini, carrots, celery and green beans and cook for an additional 3 minutes. Add the diced tomatoes, tomato paste, beans, broth and Italian seasoning to the pot. Bring the mixture to a boil. Add the tortellini to the pot and cook according to the package instructions. One minute before the tortellini is done, stir in the kale, lower heat and let simmer for five additional minutes. Remove from heat, season with salt and pepper and serve immediately with freshly grated Parmesan, as desired.
Notes
Store the soup in a sealed container in the refrigerator for up to 3 days.