Heat the olive oil in a large pot over medium heat and add the onion. Saute until translucent, around 5 minutes, then add the minced garlic and cook 1 minute more.
Add the Italian sausage and ground beef and sear, breaking up the meat until browned and cooked through. Add the spices and tomato paste and stir for 1-2 more minutes, until the spices are fragrant and the tomato paste is incorporated.
Pour in the marinara sauce and chicken stock and mix until well combined. Bring the mixture to a boil, then stir in the lasagna sheets. Reduce the heat to maintain a simmer and cook the pasta for around 10 minutes, until al dente. If the soup is too thick, add more chicken stock to achieve the desired consistency. Stir in the heavy cream and serve with the ricotta mixture and fresh basil, if using.
For the topping, mix together the ricotta, parmesan, and parsley. Season to taste, then serve with the soup.