Place the leek and red pepper in a large saucepan and sauté over medium heat for 8 minutes. Add water 1 to 2 tablespoons at a time to keep the vegetables from sticking to the pan.
Add the garlic and rosemary and cook for another minute.
Add the turnip, sweet potato, orange juice and zest, and the beans and cook for 10 minutes, or until the vegetables are tender.
Add the kale, season with salt and pepper, and cook until the kale is tender, about 5 minutes.