Heat 1 teaspoon of the vegetable oil over medium high heat in a large pan,
Add the peppers and cook for 3-4 minutes or until just tender Remove the peppers from the pan and place on a plate
Add the remaining oil to the pan. Season the flank steak with salt and pepper to taste
Increase heat to high. Add the steak to the pan and cook for 5-6 minutes or until lightly browned
Add the garlic and ginger, then cook for 30 seconds
Place the peppers back in the pan with the steak
In a small bowl, whisk together the soy sauce, sugar, ¼ cup water and cornstarch
Pour the sauce over the steak mixture and bring to a simmer. Cook for 2-3 minutes or until sauce has just thickened, then serve
