Add steak to a medium bowl then add cornstarch, oyster sauce, and shaoxing wine and mix together until well-incorporated. Allow to marinade for at least 20-30 minutes.
1 ½ tablespoon sweet soy sauce, ½ tablespoon low sodium soy sauce, 1 teaspoon black vinegar
Once steak is done marinading, heat a wok over medium high heat and add 1-2 tablespoons of neutral cooking oil like vegetable oil or avocado oil.
Add the steak to the wok, ensuring you are not over-crowding the wok. You may have to do it in two batches. Let the steak brown on one side before tossing and browning the other. Remove and put on a plate and set aside. Repeat for the remainder of the steak.
In the same wok, add shallots, Fresno peppers, garlic, and ginger and cook until fragrant. Then, add in the bell peppers and cook until tender.
2 Fresno peppers, 1 shallot, 2 bell peppers, ½ teaspoon grated ginger, 4 cloves garlic
Add the steak back in along with the scallions and pour the sauce over top. Stir to coat ingredients with the sauce. Remove from heat and serve!