Rich Italian Sausage and Potato Soup

Preheat the oven to 300 degrees F (150 degrees C).

Place sausage links on a sheet pan and bake until cooked through, 15 to 20 minutes. Cut each link in half lengthwise, then into 1/2-inch slices. Set aside for later.

Sauté onions and pancetta in a 4-quart saucepan over medium heat until onions are translucent, about 10 minutes. Add garlic and sauté for 1 minute.