Make the watermelon: Toss the watermelon and mint together in a bowl. Lightly drizzle with olive oil and lightly season with salt to taste. Refrigerate until ready to serve.
Preheat a grill or griddle pan on medium heat.
Prep the salad ingredients per instruction above.
In a bowl whisk together the ingredients for the marinade. Season with salt and pepper.
Make the chicken: Brush the chicken with the marinade on one side and season with salt and pepper. (set some of the marinade aside for brushing the chicken, do not place your brushing tool back into the marinade if it has touched the raw chicken).
Brush the bread on one side with the marinade as well.
Place the brushed side of the chicken on the grill or griddle pan, then use a spoon to drizzle a little more marinade over the top, once nicely marked (about 6 minutes), flip the chicken over, brush with reserved marinade for the chicken. Close the grill (or cover pan with a lid) and cook for another 6 minutes to an internal temperature of 160 degrees using a thermometer. Once cooked, set aside to rest for 5 minutes.
Grill the corn and bread at the same time as the chicken. Turn the corn occasionally, until nicely charred and tender. Lightly grill the bread brushed side down until golden brown. Remove from the grill.
Finish the corn: Lather with butter right before serving and lightly season with salt.
Make the salad: Mix the tomatoes, cucumber, onion, olives, feta, with the remaining marinade. Add white vinegar to taste.
Serve: Enjoy the chicken with bread, corn, salad (served in a bowl with the juices), minted watermelon, and sparkling water.