If we’re looking for bare minimum, I would say 1, depending on quantity and presentation. I would consider a bowl of lettuce a salad, but I wouldn’t consider a bowl of cucumber and onion a salad, but once you add a dressing like ranch, it’s now a salad. Even if you added something like a vinaigrette, you’d have a slaw, more specifically, in this case, but a slaw is a salad.
I haven’t played it in a good 20 years or so, but this question reminded me that bzflag exists and now I’m going to install it tonight