Step 1

Cook noodles according to package directions. Rinse and drain well. Toss with sesame oil. Set aside.

Step 2

Meanwhile, whisk together oyster sauce, rice wine, soy sauce, cornstarch and white pepper in a small bowl; set near the stove.

Step 3

Heat a large flat-bottom wok or large cast-iron skillet over high heat. Add peanut oil and swirl to coat. Add broccoli and mushrooms; cook, stirring occasionally, for 2 minutes. Add steak and garlic; cook, stirring, until the steak is no longer pink on the outside, 2 to 3 minutes more. Add the sauce and bring to a boil; cook for 1 minute. Add the noodles and toss to coat. Sprinkle with sesame seeds, if desired.