Healthy spinach lasagna with crispy cheese

For a lasagna, the most important ingredients are the lasagna noodles, and for the fillings, imagination knows no bounds. However, there are a few things to consider. Because lasagna noodles are made from pasta dough, they logically need to cook in liquid. For a filled lasagna, pre-cooking is not necessary. Therefore, béchamel sauces are mostly used, which are mainly added as a finish to the last lasagna layer. If you add too much, it quickly soaks through. Too little, and the lasagna won't be soft enough. That's why the sauce is such a flavor...