I had a mild debate with a friend today who says you don't need to cook/brown the meat before you put it in the lasagne. She would do pasta sheets, white sauce, tomato basil sauce from a jar, raw minced beef, in layers.
I do it the normal way, cooking a tomatoey meat sauce first and layering that with bechamel and pasta sheets. She said using raw meat is a perfectly legitimate time saver and tastes fine.
I can't get my head around this, and wondering whether anyone else does it this way?