Preheat a grill on high heat.

Drizzle the watermelon slices on one side with the honey. Add them to the grill, honey side down, along with the limes.

Grill for 5-8 minutes, until grill lines appear and there is caramelization on the watermelon.

Remove from the grill and cut into 1" cubes. Add to a large bowl along with the goat cheese and gently toss together. Divide between salad plates.

Squeeze the grilled limes over each portion and sprinkle with the mint. Serve.