Preheat oven to 400
Coat a 9x13-inch baking dish with nonstick spray.
Heat a large skillet over medium-high heat. Add the sausage and cook, breaking it up with a spatula and stirring regularly, until cooked through, about 8 minutes. Add the marinara sauce and cook until warmed through, 2 minutes longer. Remove the pan from the heat to cool for 2 to 3 minutes.
Spread 1/2 cup of the sausage mixture into the bottom of the prepared pan—layer on 1/3 of the ravioli in a single layer. Continue layering the sausage sauce mixture with the ravioli, making 3 layers of ravioli and a final layer of sauce. Sprinkle on the Italian cheese blend.
Cover the dish with foil and bake for 30 minutes. Remove the foil and bake until the cheese is lightly browned and the sauce is bubbly, an additional 10 to 15 minutes. Love the recipe? Leave us stars and a comment below!