Puree cantaloupe, peaches, lemon juice, and salt in food processor until smooth. Add milk to reach desired texture and smoothness. Refrigerate until ready to serve (you want it quite cold).
For drizzle, puree blackberries with vinegar of your choice. Drizzle on chilled cantaloupe mixture and garnish with fresh mint or basil.
Recipe by Hidden Ponies at https://hiddenponies.com/2012/09/first-on-the-first-cantaloupe-peach-soup-with-blackberry-drizzle/