I hesitate to celebrate the recent drop in temperature that September brought. I don't want to jinx us. It was a rough summer in the Twin Cities this year, with weeks of scorching temperatures right in the middle of outdoor entertaining season. MPR even nicknamed it Humigeddon 2011. During one of the heat waves, I enjoyed a chilled melon soup made by chef Joe Hatch-Surisook, of Sen Yai Sen Lek. On one of the hottest, more airless days of summer, he brought a sweet, cold, cantaloupe soup to a potluck and served it in cups for spooning or sipping.