Beef and Onion Stir-Fry

For a quick weeknight dinner, here is this easy Beef and Onion Stir-Fry that goes well with either white or brown rice and/or noodles.
Ingredients:
5 green onions, separate the white part from the green
1/2 tsp salt
1/2 tsp sugar
4 cloves garlic, minced
1/2 Tbsp soy sauce
1/2 Tbsp dark soy sauce
1/2 tsp sugar
1 1/2 tsp baking soda
4 1/2 corn starch
3 tsp vegetable oil
2 tsp sesame oil
3 Tbsp vegetable oil
3 tsp dark soy sauce
2 tsp oyster sauce
2 Tbsp cooking wine
1/3 cup water
Freshly ground pepper