Okay so I was at the supermarche with no real idea of what to make for dinner and ended up with spinach, mushrooms, lasagne sheets, parmesan, butter, milk etc - and thought, great, I'll do a spinach & mushroom lasagne. Now I get home and all the recipes say that you need ricotta cheese/ cottage cheese. Wouldn't this be cheese overload, what with the white sauce and all? And I really can't be a*sed to go back to the shops. Can I just do a layer of lasagne sheets, a layer of spinach and mushroom mixture (maybe with some tomato, if it has to be a bit wetter?) and a layer of cheese sauce? Will this work?