Take out your chicken if it is frozen and allow it to thaw.
Preheat your oven to 400 degrees.
In a bowl, combine the soy sauce, garlic, brown sugar, white vinegar, chicken broth, and sesame oil.
In a separate bowl toss the chicken with the flour, salt, and pepper.
Coat a large pan with cooking spray and place the chicken into the pan. Saute the chicken until browned and cooked. This will take no longer than 3 minutes (be careful not to overcook the chicken)
Now place the chicken into a baking dish, top with the sauce, and bake for 20 minutes.
While the chicken is baking you can steam the broccoli in a pot of boiling water.
Once the chicken is done, take it out and let it cool.
Dice up the chicken in the baking dish.
Now you may add the broccoli into the dish if you plan to eat it all in one sitting, or keep it separate so it stays fresh and does not get mushy (my preference)
Divide into 4 servings, add rice, or greens, or not!! And enjoy!!