need some help, please!

[reckless_saturn]

i need to cook for about 30 people this weekend. i have never cooked for this many people, so i don't know how much i need to buy.

also i need help with what to cook. i was thinking beef stew because i could make that ahead of time- but i want a delicious recipe without a lot ingredients. need a side dish- i was thinking a simple pasta dish. a dish for vegetarians. and a dessert.

anyway and all help welcomed.