I don't know if it's my body craving vitamin C or what, but lately I've been making a lot of cold salads and dips like Chilean pebre (got a great recipe, available upon request), ensalada Chilena (tomatoes, onions, vinegar, oil, salt, and one other thing I'm forgetting), Italian panzanella and bruschetta --- and we're not even growing our own tomatoes. Last week, I even made a cold quinoa salad with diced cucumber, tomatoes, onions, and cilantro --- and I'm someone who NEVER thought I'd make anything with quinoa. I mixed the last of the pebre in it and it was even better.
Other summery things I've been making and eating: ceviche (another sign of my home-away-from-homesickness for South America), and variations on salade Nicoise --- bolstered, with respect to the latter, by some recent Guardian or Telegraph treatise on the subject that disabused me of any compunction to include green beans. Though, back to the subject of this thread, I'm not sure, given some of their ingredients, how suitable either ceviche or salade Nicoise is as a summer party food, i.e., something that might have to sit around for a while at room temperature.
I'd also like to see other people's suggestions in this thread. Lately I like Mark Bittman's "vegetarian before 6" idea. It's really no sacrifice for me to not eat meat during the day; I get plenty of it with dinner with Sweet Baboo. But then, true round-the-clock vegetarians would know better than I, but I suspect it's a much easier discipline to follow in the summer than in the winter.
P.S., like the bahn mi salad idea. I'd like to hear more about that.
"Your swimming suit matches your eyes, you hold your nose before diving, loving you has made me bananas!"