Suppose it’s a very warm summer day. Actually, suppose it’s sweltering. You take refuge somewhere. Maybe there are whirling ceiling fans. Perhaps there’s air conditioning, inadequate but better than nothing. Or, possibly, you’re by the sea, in the shade, with an ocean breeze. In any case, you feel hot, bothered and hungry. Here’s a meal meant for a day like that. A cool drink — cool like a cucumber — is a given. A main-course salad is a fine idea for a warm weather repast. Think tuna, beans, tomatoes.