I haven't snapped a picture of these skewers at any of the several summer barbeques for which I've made them, but besides being juicy and chewy and savory and sweet, they are also quite lovely, pale green and red and black. You'll need:
One ripe green melon (really key that you get a good one, as we all know the horrors of unripe honeydew - cantaloupe would probably be nice too), cubed
Cherry or grape tomatoes
Gemlik olives (mild, wrinkly black "breakfast olives"), pitted
Crusty bread, cubed
Skewer these items (all at a 1:1 ratio); drizzle them with a mixture of olive oil, something tart (lemon juice, pomegranate molasses, balsamic, apple cider vinegar, etc.), rosemary, and salt; and grill them. Smaller cubes grill more nicely and are easier to eat. You can serve people their own skewers, or unskewer everything, toss in a bowl, and serve as a salad.