Beef and Broccoli Stir-fry

1 pound beef steak, cut into 3-inch strips(I used eye round)
1/4 cup gluten free soy sauce
1 small can water chestnuts
3 Tablespoons brown sugar
1 teaspoon ground ginger
2 Tablespoons cornstarch
1 cup water
4 cups frozen broccoli florets, or you can use the "Steamers" bag and microwave it
2 Tablespoons vegetable oil
2 cloves minced garlic
2 teaspoons sesame oil
hot cooked rice for side

Combine soy sauce, sugar, corn starch, and water in a small bowl until smooth and set aside.
Heat vegetable oil in a large skillet to medium high heat.
Add steak in the skillet and stir-fry until brown.
Steam broccoli.
When the steak is brown, add the water chestnuts, garlic and ginger, cook for 1 more minute. Pour the soy sauce mixture over the meat and cook until sauce thickens.
Stir in sesame oil.
Remove from heat, stir in the steamed broccoli and serve over rice.