In a large stockpot on medium-high heat, cook the pancetta or bacon until the fat is rendered and crispy. Remove from the pan and drain on a paper towel.
To the stockpot, add Italian sausage and onion. Break apart and cook until sausage is cooked through and onion tender, about 4-6 minutes.
Add potatoes, garlic broth, and beans. Bring to a boil then reduce to low heat and simmer until potatoes are fork tender, about 20-30 minutes.
In a small bowl of measuring cup, whisk together milk or half & half and cornstarch. To the stockpot, add milk, salt, pepper, nutmeg, and kale. Simmer 5 minutes to allow to thicken and kale become tender.
Dish in soup bowls and garnish with parmesan and pancetta.