Easy Mongolian Beef

Name: Easy Mongolian Beef
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: American, Chinese
Ingredients: 2 teaspoons + 2 tablespoons oil ((vegetable or olive)); ½ teaspoon ginger (minced); 4 cloves garlic (finely minced); ½ cup soy sauce ((low sodium is best)); ¼ cup water; ½ cup packed brown sugar; 1 pound flank steak ((or your favorite cut of beef thinly sliced)); ⅓ cup cornstarch; 2 green onions (sliced)