This soup is a complete meal! Just add a warm French baguette and you’re golden. Feel free to experiment with different types of sausage, including the wonderful variety of flavored chicken sausages sold with the other poultry products at the supermarket.
Heat the oil in large saucepan over medium-high heat. Add the onion and cook, stirring, until softened, about 3 minutes. Add the sausage and cook, stirring, for 2 minutes. Add the broth and bring to a simmer.
Using a fork, slightly mash most of the white beans and add to the pan. Simmer for 5 minutes, then add the collard greens and simmer until wilted, about 3 minutes. Stir in the vinegar, season with salt and pepper, and serve.
Photo: Judd Pilossof