I would do something like eat out for three nights (ten days is an awfully long time to have 5 people-hope you like them!!)and have a take away for one night.
So that leaves six nights. Do a cold buffet for one of those. Then how about:
Curry one night (They taste loads better if made beforehand)
Beef bougignon one night (Again frozen)
Chicken casserole one night (Again frozen)
Pasta and sauce (Again frozen-something simple like tomato, chorizo and olives with a bit of chillie)
Leaves one night to do a 'wow' dish. In your situation I often make a Paella. V easy as once you've fried the base and added the rice, you pop the seafood on top (mussels and raw prawns), cover with foil and let it cook itself. Then garnish with lemon and flat leaf parsley and voila!!
Make up a big jar of home made vinaigrette beforehand (sooo much nicer than shop bought)and eke out above meals with bags of nice salad, hot crusty bread and/or potatoes and/or rice.
On the curry night, make a cucumber and yoghurt raita, mix finely chopped peppers,toms and onions with some cumin, and grate a load of carrots, fry mustard seeds until 'popping' and then tip in the grated carrots and stir. Three great liitle sambals to accompany the curry. Get some good pickles in too.
Breakfast-help yourself job (and clear away after youself)
Lunch-sandwiches (if around) Hopefully they'll be out tending to themselves.
Have a lovely time-hope they bring plenty of booze1!