How about barbecue chicken (kosher) and Hebrew National beef hot dogs? There could be a kosher barbecue sauce and some kosher side dishes and desserts (probably not including dairy because of the beef hot dogs). Maybe salad with italian dressing, boiled eggs, delicious green vegetables, maybe fruit salad for dessert?
Just some ideas.
Maybe someone could make some sort of matza dish with all the talk of matza lately.
Hebrew National are problematic in terms of kashrut.. I have heard of some controversy there.
There is more to kashrut than the makes. For it to be properly kosher, cutlery e.t.c. has to have been to a mikvah keilim... It should be done by somebody who is strictly orthodox and knows what he is doing already regarding kashrut.. People who don't know about kashrut already, should not be planning the kashrut details!
I have had times when I have eaten at a secular jewish friend's house, and they have gone to the trouble of getting a kosher make of burger, but then cooked it in their oven, which has of course had non kosher things in there. They always thought it strange that I didn't eat anything. Another secular friend more sensibly would give paper plates and a packet of bamba snacks!