I think my mom makes around 7 cups of rice for 50 people and she adds 1.5 to 2 medium sized bags of peas in them. I think she doesn't put more then 5-6 glass of rice in 1 big tray.
She always gets thighs and legs for the salan, and her count is app. 2 pices of chicken for everyone. If the thighs are too big, she get them cut in half. Salad I say a small tray, if people really like salad then make a big one. Dessert, I would say cut some cantaloupe and watermelon. That is what my mom did.
for vegetables, just make mix vegetable. It is easy.
Lusi is right about the rice and chicken....
For a vegetarian dish you can do channay or aalo chanay...its a nice dish and easy too...
Either do fresh fruits for dessert or maybe a store bought sheet cake....
since you are cooking for a lot of people,maybe you would want to keep it easy.
