Grilled Watermelon, Heirloom Tomato and Blueberry Salad

Directions:

1. Set up grill for direct heat cooking over medium-high heat. 
2. Clean cooking grates and coat with oil before grilling.
3. Place watermelon slices on hot grill and cook for about 2 minutes per side until lightly marked and deeper in color. 
4. Set aside to cool and then chill in the refrigerator. 
5. Keep all ingredients cold.
6. Remove rind from grilled watermelon and cut into bite-size pieces. 
7. Place watermelon, tomatoes, blueberries, feta, and mint in a serving bowl. (Can be made a couple hours ahead to this point and kept cold covered in the refrigerator.) 
8. Squeeze in the orange and lime juices and then toss to combine. 
9. Serve cold or at room temperature.