Using frozen spinach and swapping bechamel ... a further quarter of the ricotta mixture and a layer of lasagne sheets. Repeat again so the lasagna sheets are on top and there is still a quarter ...

Mix ricotta, eggs, oregano—season with salt and pepper. In the same pan, saute spinach with a bit more oil just until wilted. Moisten the bottom of the lasagna pan with tomatoes so the casserole ...