Boil sweet potato until fork tender, puree and set aside.
In a pot, bring 3 cups of water, milk, and 1 teaspoon of salt to a boil. Whisk in the uncooked polenta. Lower the heat to low, cover and allow polenta to cook for about ten minutes or until thickened.
Turn off heat and whisk in pureed sweet potato, butter, Parmesan, cayenne pepper, and smoked paprika. Season to taste with salt and pepper. If polenta is too thick for your preference, stir in additional milk to thin out. Keep polenta covered and warm while you cook the sausage and chard.