To the insert of a 5- or 6-quart (or similar size) slow cooker, add the potatoes, chicken broth, parsley, and garlic. Cover and cook on low for 5-6 hours or high for 2-3 hours until the potatoes are tender.
Leave the potatoes in chunks OR lightly mash them in the slow cooker until slightly chunky (I prefer mashing the potatoes lightly).
Stir in the cooked sausage, tortellini, half and half, and spinach. Cook on high for 20-30 mins until the tortellini is tender. Season to taste with additional salt and pepper! The soup will thicken slightly as it cools (refrigerated leftovers will thicken quite a bit).
