Thin slice the steak, pat very dry and place in a bowl.

Add cornstarch to bowl and toss until all meat is evenly coated.

Add oil to a large skillet and heat over medium.

Shake off excess cornstarch and cook in batches. Cook 1 minute per side.

Remove cooked meat to bowl while making sauce.

Place onions and red bell pepper in a microwave safe dish and microwave for 3 minutes.

Place frozen green beans in microwave and cook for 6 minutes.

Add ginger, garlic and red pepper flakes to pan and cook for 1 minute.

Add bell pepper and onions and stir.

Add brown sugar, soy sauce and water. Mix and bring to a boil.

Add green beans and cook for 3 minutes.

Return meat to skillet and continue cooking until sauce thickens and meat is heated through.

Garnish with green onions and serve over rice.