Thanks for all your suggestions. I found a red pepper lurking at the back of the fridge and remembered there were about 10 cooked king prawns in the freezer, so I've done a paella-type thing:
cooked onion, garlic, red pepper, celery and finely chopped parsley stalks, slung in rice (not paella rice, not that organised 
), pinch of turmeric, generous pinch of smoked paprika, splash of white wine and then chicken stock to cook in the manner of a risotto. End of a bag of frozen peas mixed in when the rice was done.
Meanwhile cooked the chicken in the griddle pan, then sliced the cooked chicken and mixed it into the rice with the prawns.
Bit of chopped parsley leaf on top.
Actually it was delish, or at least DS1 and I think so. DS2 and DD have picked out all the prawns and chicken and just moved the rest around their plate, but I don't suppose they're going to waste away overnight.
Must bookmark the site shubie linked to, that could be very useful.