01 -
Place a rack in the center of the oven and heat to 425°F. Spray an 18x13-inch rimmed sheet pan with nonstick cooking spray.
02 -
Heat olive oil in a skillet over medium-high heat. Add the sausage and cook for 7-9 minutes, breaking it up, until browned and cooked through. Stir in the marinara sauce and remove from the heat.
03 -
In a bowl, stir together ricotta, egg, 1/2 cup Parmesan, parsley, salt, and pepper until combined.
04 -
Spread about 1 1/2 cups meat sauce over the sheet pan. Arrange half the no-boil noodles over the sauce, overlapping slightly and breaking pieces to fit.
05 -
Dollop the ricotta mixture over the noodles, then spread gently. Add about 1 1/2 cups mozzarella and 2 cups meat sauce. Top with remaining noodles, remaining meat sauce, remaining mozzarella, and remaining 1/4 cup Parmesan.
06 -
Spray one side of a large sheet of foil and cover the pan with the greased side facing the cheese. Bake for 25 minutes, until the noodles are tender.
07 -
Remove the foil and bake for 10-12 minutes more, until the cheese is melted, bubbly, and browned at the edges.
08 -
Let the lasagna rest for 10 minutes before cutting into squares. Serve hot with extra parsley if desired.