I do things similar to Tartan. I use about 3 different cheeses and have one or two layers of Ricotta mixed with an egg a couple handfuls of fresh grate Parmesan and lots of fresh parsley. I use a tomato sauce with lots of veggies (onions, celery, garlic, minced carrot (not too much or it will be too sweet) diced butternut squash, and no meat if I know there will be non meat eaters at the meal. I am not a fan of mushrooms, so do not use them.
Most the family eats meat, so I generally make a regular meat lasagne.
I love the theme of your dinner. Will Sex in a Pan be your dessert?
It is great that you are serving meat on the side, then people can choose to add it to their meal.