Clean and rinse the broccoli florets. Cut the broccoli into 1 inch pieces and place into a salad bowl. Add a couple tablespoons of water and place in the microwave for 3 minutes. Broccoli will be barely tender. Remove from the microwave and drain the little bit of water from the bowl. Set aside. Season the chicken with salt and pepper. Place on a grill and grill until cooked through (or bake in a baking dish until no longer pink). Let the chicken rest for a few minutes and then cut into cubes. Place the chicken in the bowl with the broccoli. Cut the tomatoes in half and place in the bowl and toss with the broccoli and chicken. In a small bowl, combine the sauce ingredients and then pour over the salad ingredients. Toss to coat and season with extra salt and pepper as needed.