2nd Birthday Phrase Any Ideas On What To Serve For A 2nd Birthday / Family Gathering?

Any ideas on what to serve for a 2nd birthday / family gathering? - 2nd birthday phrase

We host my mother-in-law of the country for two weeks in October. We are meeting with my family. Even the 2 Birthday of our son. We are planning to jointly) on the weather out on the streets (. Was it a mistake to consider such a meeting and ask everyone to bring a covered dish to? Serve all ideas about the types of foods would be?