Prepare beef according to package directions.
Add onions and garlic to pan with beef, sauté 2 to 3 minutes or until onion becomes translucent.
In medium bowl mix tomato sauce, cooking sherry, oregano, WOW Seasoning and cornstarch.
Pour sauce mix over cooked beef and onions, gently stir.
Heat beef mixture until sauce thickens.
Serve over hot rigatoni pasta or spaghetti.
Top with grated parmesan cheese and chopped fresh basil.