Our new kitchen extension is almost finished, and when it's done we will be the natural 'gathering point' for my extended family, meaning that we will regularly need to feed approx 15 people (mix of adults & kids), often at short notice (eg we all meet at the park together and then decide to come back to ours for lunch). So wise mumsnetters, what tips can you give me - meals/cookbooks/things to keep in the house etc - so that I can cater for these kinds of numbers regularly? Cheap, fast and gluten free ideas especially appreciated!!! Thanks.