Combine CBD oil, tamari, white sesame seeds, sesame oil, lime juice, chili garlic sauce, maple syrup, rice vinegar, and green onions in a large mixing bowl. Add the watermelon, toss gently to coat, cover bowl with plastic wrap and refrigerate for 1 – 4 hours.
Divide rice between two bowls. Using a slotted spoon, add the watermelon to the bowls then finish constructing the bowls with the remaining ingredients.