Cheesy Beef Tortellini Casserole with Basil
Vegetable oil may be substituted for canola oil, if desired. Italian sausage may be used in place of ground beef.
You can use low-fat cottage cheese instead of ricotta cheese; just pulse several times in a food processor until the cottage cheese is smooth.
You can save time by using marinara sauce from a jar. Just combine meat, sauce, and tortellini, skipping the onion and garlic. Also, if you're in a big hurry, omit the ricotta mixture, although I think it's worth the extra time to give it that more authentic Italian feel.