Sesame Beef Stir Fry

3 tablespoons soy sauce
8 tablespoons vegetable oil
2 teaspoons dijon mustard
2 teaspoons honey
1/2 teaspoon red pepper flakes
2 minced garlic cloves
1 pound flank steak cut into strips
1 teaspoon dried ginger
1 medium onion thinly sliced
1 red pepper thinly sliced
1 green pepper thinly sliced
1 bunch of broccoli cut into flowerets
1 8 ounce can sliced water chestnuts
3 tablespoons sesame seeds

In a medium bowl whisk the soy sauce, 4 tablespoons oil, honey, mustard and red pepper flakes.  Add steak, toss, cover and marinate for 15 minutes at room temperature.  In a wok or skillet heat 2 tablespoons oil over moderately high heat until hot, but not smoking.  Saute garlic, onion, peppers, broccoli, stirring for 5 - 7 minutes. Transfer to another bowl.  Heat remaining 2 tablespoons oil in skillet or wok until hot, but not smoking.  Saute steak, stirring for about 2 minutes.   Stir in sauteed vegetables and water chestnuts and heat until heated through.  Serve with rice.   Serves 4