Prepare the Oven and Sausage: Preheat the oven to 375°F (190°C) and grease a 9x13-inch baking dish with nonstick spray. In a large skillet, cook the sausage over medium heat until browned and fully cooked, breaking it into crumbles. Remove from heat and set aside.

Prepare the Alfredo Sauce: In the same skillet, melt the butter over medium heat. Once melted, add the minced garlic and sauté for 1 to 2 minutes, or until fragrant. Gradually pour in the heavy cream, stirring constantly until the mixture starts to simmer. Lower the heat and let it cook for 5 minutes. Incorporate the Parmesan cheese, along with salt, pepper, and red pepper flakes. Stir until the cheese has melted and the sauce is velvety and creamy. Remove from heat.

Layer the Lasagna: Begin by spreading a thin layer of Alfredo sauce across the bottom of the prepared baking dish. Arrange a layer of ravioli over the sauce, followed by a layer of cooked sausage and a sprinkle of mozzarella cheese. Repeat layers of Alfredo sauce, ravioli, sausage, and mozzarella until all ingredients are used, ending with a layer of mozzarella cheese on top.

Top and Bake: Sprinkle Italian seasoning evenly over the top layer of cheese. Seal the dish with aluminum foil and bake for 20 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the cheese is golden and bubbly.

Serve: Allow the lasagna to cool for a few minutes before slicing. Serve warm and enjoy the creamy, cheesy layers with a bit of spice from the sausage and red pepper flakes.