Coat chopped broccoli in olive oil, salt, and pepper. Roast at 400 degrees for 25-30 minutes.
Cube chicken breasts. Toss in mixture of flour, garlic powder, ginger, and salt/pep.
Add chicken to a large skillet with a touch of oil. Cook all the way through over medium heat (about 7-10 mins, but test a piece or two).
While chicken is cooking, mix together sauce ingredients- start with just corn starch and soy sauce, mixing together so the cornstarch can dissolve, then add everything else.
Pour sauce over cooked chicken and bring to a simmer over low heat, stirring frequently.
Once sauce has thickened (about 5 mins) stir in broccoli.
Serve over rice (optional)