Preheat oven to 350F.
Cook pasta according to package directions until al dente.
Heat dutch oven or skillet over medium heat and add olive oil and chopped onion.
Add ground beef and sausage and cook thoroughly.
Add garlic and cook 2-3 minutes.
Stir in spaghetti sauce until fully combined.
In a glass bowl mix ricotta cheese, sour cream, parmesan, Italian seasoning, salt, and pepper.
It not using a dutch oven, transfer meat mixture to an oven-safe dish. Stir pasta into meat mixture and mix well.
Top pasta and meat with ricotta mixture, spreading evenly.
Top with shredded mozzarella cheese and sprinkle with Italian seasoning.
Bake for 30 minutes or until bubbly and brown around the edges.
Let stand for 10 mintes prior to serving.