In a large pan, heat the oil and sauté the chopped onion for 1 to 2 minutes, or until tender.
Combine 30 oz. Cannellini beans and 6 cups water in the pan.
Season to taste with salt and black pepper.
Bring to a boil with the ground cinnamon, covered.
Boil for 15 to 18 minutes, then decrease to a low heat and continue to simmer for 1 1/2 hours.
Simmer on low heat.
Check periodically and add hot water if required.
Add the Tubetini pasta and continue simmering until the Tubettini is al dente.
Remove from heat and serve on a plate.
Add grated parmesan cheese on top.
Enjoy Deana Martin Pasta Fagioli!