Whisk your balsamic vinegar and honey together in a very small saucepan over high heat. Bring to a boil, then immediately reduce heat to low, and simmer until the vinegar mixture has reduced about 8 minutes. Set aside to cool completely.

In a large serving bowl add the watermelon, blackberries, shaved parmesan, and pecans.

Drizzle with your homemade balsamic glaze as desired and gently toss.

Serve immediately and enjoy!