In a large bowl or pot, cover the lentils with plenty of water, then let them soak at room temperature for at least 4 hours. You can also leave them to soak overnight. Drain the water, then rinse the lentils with clean water.
Drain the sun dried tomatoes, reserving the oil. Using a small food processor, ninja, or just a knife, finely chop the sun dried tomatoes, then set them aside.
In a large stock pot set over medium heat, heat the reserved oil from the sun dried tomatoes for several minutes. (If you prefer not to use the oil from the jar, which usually contains vegetable oils, you can discard the oil from the jar and simply use 2 tbsp olive oil instead.)
Add the chopped onions to the hot oil, and cook for several minutes, stirring frequently, until softened. Add the minced garlic and cook for one more minute.
Add the chopped sun dried tomatoes and all the spices, stirring constantly while cooking for one minute.
Add the chicken broth, 2 cups water, the drained/rinsed lentils, and the Parmesan cheese rind.
Cover the pot, bring to a boil, then reduce to a simmer. Simmer, covered, for 30-45 minutes, until the lentils have softened and are beginning to break down, and most of the liquid is absorbed. Add more water as desired, for a more brothy consistency.
Add the sliced sausage, and simmer for 10 more minutes until the sausage is heated through.
Remove the pot from the heat, stir in the milk and cream, and serve.