You have a huge family. You are wanting to throw a party but do not know what to serve. Never fear! Party advice here! Learn how to feature Various Self Serve Food Bars
If you want to serve something filling, I think a sandwich bar would be perfect. However, such a food bar would be a little expensive, with several pounds of lunch meat, cheese and many loaves of bread. However, I really like this food bar.
If you are wanting to be frugal, there are tons of options swinging that way, such as popcorn (bought at dollar stores) bars, potato (less than $3.00 a bag) bars & waffle (bought at dollar stores) bars.
What about even a drink bar? Whether cocktails or mocktails or lemonade or different iced teas? How about coffee? Various flavors, hot or iced?
So, this is my opinion. I hope that my two (2) cents have given you something to go on.