How to Make It
Heat oil in a large skillet over medium-high. Add sausage; cook 5 minutes or until browned, stirring to crumble. Stir in pepper. Remove sausage mixture to a bowl with a slotted spoon. Remove pan from heat (do not wipe out pan).
Combine onion, carrot, and garlic on a cutting board; finely chop. Return pan to medium-high. Add onion mixture to pan; cook 5 to 7 minutes or until tender. Add sausage mixture, 1/2 cup water, and tomato sauce to pan; cook 1 minute.
Bring remaining 3 cups water to a boil in a medium saucepan. whisk in polenta. Reduce heat; cook 3 minutes or until thickened, stirring frequently with a whisk or spoon. Stir in cheese. Serve polenta with pork mixture and parsley, if desired.