FOR THE STEAK, MUSHROOMS and PEPPERS:
2 pounds flank steak (or use steak of your choice)
salt and freshly ground pepper
8 ounces button mushrooms, sliced
1 red bell pepper, julienned
1 yellow bell pepper, julienned
1 1/2 tablespoons cooking oil, separated
FOR THE TERIYAKI SAUCE
1/4 cup soy sauce
1/4 cup mirin (Japanese sweet rice wine)
2 tablespoons sugar (or more if you like a sweet teriyaki)
1) To make the Easy Teriyaki Sauce, whisk all the sauce ingredients in a small sauce pan and simmer on low for 3 minutes, until the sauce has thickened slightly.
2) Add one tablespoon of the cooking oil to a pan over medium-high heat. Sear the steak on both sides and remove from pan.
3) Add the remaining 1/2 tablespoon of cooking oil. Add the mushrooms and sauté for about 2 minutes then add the peppers and cook another 2 minutes.
4) Place the steak back into the pan, reduce heat to low and add the teriyaki sauce, let simmer for 1 minute. Serve the teriyaki mushrooms and peppers on top of the steak.