Step 1

Heat olive oil in a large Dutch oven over medium heat until shimmering. Add sausage and salt pork and cook, stirring occasionally, until lightly browned on all sides, about 12 minutes. Add leek, onion, celery, pepper, jalapeño, pepper flakes, and garlic and cook, stirring and scraping up browned bits from the bottom of the pan until softened and lightly browned, about 10 minutes. Stir in kale, cover, and cook until kale starts to wilt, about 3 minutes. Uncover, stir, and continue to cook uncovered until kale is completely wilted, another 5 minutes.

Step 2

Add peas, chicken stock, and bay leaves. Season lightly with salt and pepper. Add water as necessary until beans are completely covered. Bring to a boil, reduce heat to low, cover, and cook until beans are completely tender, 45 minutes to 1 hour 15 minutes, depending on the size and age of your beans. Stir in vinegar, season to taste with salt and pepper, and serve. Soup can be stored in sealed containers in the refrigerator for up to 5 days.