You should only make this dish (Baked Pasta w/Spinach, Lemon, and Cheese) when you have a lot of patience and time (which I, unfortunately, have little of), since it takes about an hour and a half+ to make.
On a positive note, the recipe yields six servings, so if you whip it up on a Monday you'll have lunch the rest of the week (yipee!).
Note: Add red pepper flakes to the onion mixture, another clove of garlic, and a bit more salt to take this dish's flavor up a notch. If you're feeling adventurous, you may even want to experiment with a sharper cheese.