01 -
Start by prepping fresh mozzarella if you're using it—slice it and rest it on some paper towels to soak up the extra liquid. While that's happening, thaw your spinach. If you're pressed for time, boil it fast for a minute and strain all the water using a colander.
02 -
In a big bowl, combine your thawed spinach, ricotta, and most of the parmesan (save a bit for later). Add salt and some black pepper to bring out the flavor—give it a taste to make sure it's perfect.
03 -
Preheat your oven to 400°F (200°C). If you're working with dry pasta sheets, cook them as the package instructs—they should be just tender. Spread about half a cup of marinara across your dish's bottom as your starting layer.
04 -
Now it gets fun! Lay down your lasagna sheets, spread about 1/2 cup of marinara, then add a quarter of your spinach-ricotta filling. Sprinkle a slice of that mozzarella (use about one-fifth of it each time). Do this layering four times, making sure it's all even.
05 -
Top it off with your last sheets and spoon on all the leftover marinara. Sprinkle the rest of your parmesan and mozzarella over the top. Pop it in the oven for 25–30 minutes until the edges turn golden and the cheese is melted and bubbly. Cool it for 10 minutes (I know, it’s tough!) before adding fresh basil and digging in.