Label a gallon-sized freezer friendly Ziploc bag with the name, date, and cooking instructions. Set aside.
In a skillet over medium-high heat, brown the sausage. Drain as much grease as possible and transfer to a plate.
In the residual grease from the sausage, fry the bacon(if using) and then transfer the bacon to the same plate as the sausage. Drain all but a tablespoon of the bacon grease.
Lightly cook the onion and garlic in the residual grease.
Transfer the sausage, onion, and garlic to freezer bag.
Add chopped potatoes to the bag. Seal and freeze.
When ready to cook, thaw the bag in the fridge overnight.
Transfer ingredients to the slow cooker, cover in chicken broth, and cook on low for 5 to 6 hours or on high for 3 to 4 hours.
In a small bowl, whisk together the cream and the flour to create a roux. Pour into slow cooker and add the kale. Stir to combine.
Cook on high for another 30 minutes to thicken.
Season with salt, pepper, and pepper flakes. Top with bacon and parmesan cheese to serve.