Combine all ingredients in a small bowl to create a dry rub. Massage the dry rub liberally all over the turkey breasts.
Grill over medium-high heat approximately minutes per side or until an instant-read thermometer reads 170ºF (77ºC). Remove to cutting board and let rest for 5 minutes. Refrigerate.
TO MAKE DRESSING:
Combine 1/4 cup fresh lime juice, 2 Tbsp sugar and 1 Tbsp canola oil in a small bowl.
TO MAKE NOODLE SALAD:
Cook noodles as per package instructions. Let cool.
In a large bowl toss cool noodles with dressing, cucumber, watermelon and red onions. Place slices of turkey on top. Sprinkle with cilantro and fresh ground pepper.