If you prefer ground turkey or ground beef you can use that in place of the Italian sausage.
Greek yogurt can be used in place of sour cream to make the sauce creamy.
For more of a lasagna look to the dish you can sprinkle an additional 1/4 cup of mozzarella cheese over the top and broil until melted and bubbly.
This recipe calls for 1 1/2 jars of pasta sauce. You can freeze the remaining pasta sauce to use next time or to use as pizza sauce.