Trim roast of silver skin and fat. Pound roast with meat mallet vigorously on both sides.
Slice roast, against grain, very thin. Less than 1/4 inch. (Works easier if roast is slightly frozen.)
Mix marinade ingredients together and pour over sliced venison. Stir. You can refrigerate overnight but if you have the time, let them marinate for 2 hours. If they are frozen, you don't have to refrigerate them, unless it's very warm out.
In a large frying pan, or wok add about a tablespoon of oil, over high heat.. Peanut oil works well but any higher temperature oil will work.
Cook the venison, in batches just for a few seconds. Flip and cook the other for another few seconds. It will not take a minute to cook both sides. When you remove the venison to drain, it should still be pink in the center. Reserve marinade!
Drain, each batch on your wok rack, or paper towel. After all of the venison is cooked, cook the green beans. They will take about 5 minutes to reach crisp, tender. Drain.
Next stir fry the peppers. They will only take about 1 minute to achieve tender crisp consistency. Drain.
Dump any oil that is left in the wok. Turn down heat. Add reserved marinade to pan and then add the cornstarch.
Cook until sauce turns a a beautiful dark brown color. Use a whisk to remove lumps from cornstarch, if needed.
Add meat and vegetables back to wok and toss to coat. Heat through. Serve with rice. (I like Jasmine rice)
Video
Notes
Prepare all ingredients before starting to cook.Cook vegetables crisp tender because they will continue to cook when dish is assembled.Reheat leftovers in microwave.Leftovers good for 3-4 days.