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.
Cook Sausage and Swiss Chard
Over medium-high heat, brown the smoked sausage rounds in olive oil. Remove sausage from pan onto a plate. Add onions and garlic to the hot pan and sauté for 1-2 minutes. Stir in chard ribbons and cook for an additional 2-3 minutes until greens soften. Season with salt and pepper, and stir in splash of rice vinegar.
Divide polenta into bowls and top with sauteed vegetables. Top with smoked sausage. If desired, sprinkle with additional cheese. Serve warm.