Preheat oven to 350 degrees

in large skillet, crumble sausage and cook until browned. add spinach and cook until wilted.

in 9x13 pan, ladle enough pasta sauce to cover bottom of pan. arrange ravioli to cover bottom of pan. cover ravioli with sausage and spinach. poor remaining pasta sauce over sausage and spinach. add cheese to top of dish

bake until bubbling in middle, about 45 minutes. let cool 10 minutes before serving.