Sprinkle the pork slices with one teaspoon salt.
Heat 2 tablespoons of oil in a large, deep, non-stick skillet or wok over medium-high heat.
When the oil is hot, add the pork slices, arrange them in a single layer and cook 2 minutes.
Turn each piece and cook another 2-3 minutes until the liquid rendered by the pork cooks out.
Cook the pork tenderloin slices while stirring for 1-2 minutes or until the pork is cooked through, no pink should be visible and the outside should have a light golden color.
Add the vegetables to the skillet and stir well.
Next, add the sauce and stir well to coat the ingredients with the sauce.
Lower the heat to medium-low, cover and cook for about 2-3 minutes, or until the vegetables reach the desired tenderness (the less time the crispier the vegetables will be, cook longer if you like them tender). Stir frequently.
Garnish with sliced green onions, if desired and serve over rice or noodles.