01 -
Preheat the oven to 190°C (375°F). Lightly coat a 20×25 cm or 20×20 cm casserole dish with nonstick spray. Place a foil-lined baking tray on the lower rack to catch potential drips.
02 -
In a large skillet over medium heat, crumble and cook Italian sausage until browned and cooked through. Remove sausage with a slotted spoon and set aside, reserving 1 tablespoon of drippings in the skillet.
03 -
Reduce heat to medium-low. Add butter and minced garlic to the skillet and sauté until fragrant, about 30 seconds. Slowly whisk in heavy cream. Add black pepper and red pepper flakes. Bring the mixture to a gentle simmer and cook, stirring, until slightly thickened, 3–5 minutes.
04 -
Gradually whisk in grated parmesan cheese to the cream mixture until smooth and cohesive. Taste and adjust salt, pepper, and red pepper flakes as needed. Remove from heat.
05 -
Meanwhile, bring a large pot of salted water to a boil. Add ravioli and cook according to package instructions until just al dente. Drain well.
06 -
Spread 80 ml (about 1/3 cup) of alfredo sauce in the bottom of the prepared dish. Layer half of the cooked ravioli, followed by half of the cooked sausage, half of the remaining alfredo sauce, and half of the mozzarella cheese. Repeat layering with the rest of the ravioli, sausage, sauce, and cheese.
07 -
Sprinkle Italian seasoning and extra red pepper flakes over the top. Cover the casserole with foil coated with nonstick spray to prevent cheese sticking.
08 -
Bake covered for 30 minutes. Remove foil and continue baking for 10–15 minutes, or until cheese is golden and the edges are bubbling.
09 -
Let the lasagna stand for 10 minutes before slicing for clean portions. Serve hot.