In large zip-top plastic bag, combine turkey, tomatoes with their juice, beans, onion, oregano, garlic, salt and pepper; seal bag, pressing out excess air. Massage bag to break up turkey into small pieces; refrigerate up to 2 days.
Prepare pasta as label directs; drain and transfer to large bowl. Stir in oil and refrigerate pasta mixture 15 minutes or until completely cool; cover and refrigerate up to 2 days.
Day Of
In 5- to 6-quart slow cooker, stir turkey mixture, breaking up turkey with side of wooden spoon until well combined; cover and cook on high 2 ½ hours or low 5 hours. Stir in prepared pasta and sprinkle with mozzarella cheese; cover and cook on high 10 minutes or until cheese melts and pasta is heated through. Makes about 8 cups.
In small bowl, stir ricotta cheese, basil and Parmesan cheese. Makes about ½ cup.
Serve turkey mixture topped with ricotta cheese mixture garnished with basil, if desired.