How to make teriyaki steak and peppers

This recipe could be made as a side or a main meal. Either way, it's very tasty! I hope you enjoy making it. Let me know how it comes out.

Ingredients:

1 pound of flank steak
1 tsp baking soda
1/2 tsp sesame oil
1 tsp soy sauce
1 tbsp cornstarch

Sauce:

1/4 brown sugar
1/4 cup soy sauce
1 tsp sesame oil'
1 tsp mirin
1 tsp corn starch
1 tsp chili flakes

Enjoy!