Prep: 1. Remove sausage casings. 2. Slice celery. 3. Dice onion. 4. Remove stems and tear kale into pieces. Make: 1. In a large Dutch oven or pot, heat oil over medium-high heat. Add sausage and cook, breaking into pieces with a wooden spoon, until golden brown, about 5 minutes. Add celery and onion and cook until softened, about 5 minutes. 2. Add lentils, broth and 1/2 cup of water and bring to a boil. Reduce to a simmer and partially cover. Cook until lentils are tender, about 25 minutes. 3. Add kale and cook until tender, about 5 minutes. Season to taste with salt and pepper.