Add the marinara-bean mixture to the pan and stir. Stir in the pasta and combine well. Bring to a simmer, cover, lower the heat to low (you want it at a low simmer) and cook for 20-22 minutes or until the pasta is just soft. Stir once or twice through the cooking process to ensure that the pasta doesn't stick to the bottom of the pan. Remove from heat and stir in the shredded cheese. Dollop with the ricotta cheese and serve with Parmesan if desired.