Good restaurants in Keene or Brattleboro that cater?
Second the vote on Luca's. Good folks. Good food.
(I took several friends there for lunch one Sunday this past autumn and discovered they weren't open. The deli door was open, though, because they were readying a catering meal. After expressing my disappointment, Mr. Luca paused in the midst of getting ready for the catering job and sighed and said, "OK! Yes! I will make you some sandwiches! What would you like?"
And he did. And they were good. And we were happy.
So 10 thumbs up (there were 5 of us).