Cut the watermelon into 1-2 inch cubes and put into a large bowl. Dice the feta cheese into 1 inch cubes. Add to the watermelon. In a measuring cup add the olive oil, balsamic vinager, honey, salt and pepper. Whisk to combine. Pour over watermelon. Add the mint and toss lightly till combined. Serve as a side with burgers Bon Appetit.