1. Preheat oven to 375. In the meantime assemble the Ravioli Lasagna.
2. Spray a 9×13 pan lightly with cooking spray. Spread a thin layer of pasta sauce on the bottom of the pan, about 3-4 tablespoons.
3. Place about half of the ravioli in the bottom of the pan, laying them so the ravioli makes a single layer.
4. Top evenly across the ravioli with ¼ cup chopped onion, half the package of sausage crumbles, ½ cup cottage cheese and half the bag of mozzarella cheese. Pour half of the remaining pasta sauce evenly over the top.
5. Repeat beginning with a second layer of ravioli and adding the remaining half of the other ingredients.
6. Top with the Parmesan cheese and the Italian seasoning, sprinkling both evenly over the pan.
7. Cover with foil.
8. Bake covered for 45 minutes until hot through. Remove foil and bake about 15 minutes more until edges are golden and bubbly.

To Make Ahead – Follow directions as above to make Ravioli Lasagna. Cover with foil as ready for baking. Then wrap with additional foil layer to freeze. To thaw, place in refrigerator 24-48 hours before baking according to directions above to serve.