01 -
Preheat the oven to 375 F. Lightly oil a 9x13-inch baking dish and spread 1 cup of marinara sauce across the bottom.
02 -
In a large bowl, combine the squeezed spinach, ricotta, egg, 3/4 cup parmesan, garlic, parsley, basil, nutmeg, salt, and pepper. Stir until the spinach is evenly distributed.
03 -
Place 3 oven-ready noodles over the sauce. Spread one-third of the spinach ricotta filling over the noodles, then add 1 cup mozzarella and 3/4 cup marinara.
04 -
Repeat the noodles, spinach filling, mozzarella, and sauce two more times. Finish with the last 3 noodles and the remaining marinara, spreading sauce to the corners.
05 -
Cover the dish tightly with foil, tenting it slightly so it does not touch the cheese. Bake for 40 minutes, until the sauce bubbles around the edges and the noodles are tender.
06 -
Remove the foil. Sprinkle with the remaining mozzarella and 1/4 cup parmesan. Bake uncovered for 15-20 minutes, until the top is melted and golden in spots.
07 -
Let the lasagna rest for 20 minutes before slicing. This helps the cheese filling set and keeps the layers neat.