Whilst not being specific with actual recipes, what about.....
Indian food, huge number of dishes that you can all enjoy and meat can feature as a separate dish or split a veggie dish and add marinated meat to it.
Ditto Thai.
Ditto North African tagines.
Fajitas just cook meat separately, burritos, quesadillas etc can be easily adapted to suit all appetites.
To be a bit more boring buying/making small quiches to be served with salad can easily suit all appetites as we head into summer.
Veggie sausages can easily be cooked at the same time as meaty bangers for sausage and mash.
Pizza is an easy one to self do.
Pasta options are endless, as are risottos.