The red onions make this recipe full of flavor and is so quick and easy to prepare and served with brown fried rice on the side along with yellow beans..quite a colorful plate to serve to family or friends.
Preheat oven to 400F with sharp knife strip off the thin silvery skin and any fat..then cut tenderloin into 1/2 inch slices..Heat a large skillet over medium_high heat..add butter and swirl pan to spread butter add sliced pork to hot pan and sear on both sides about 2 or 3 minutes per side, or until golden.
Transfer pork to a rimmed baking sheet and roast in oven for 10 minutes or until just a hint of pink remains inside. Remove from oven tent with foil and rest for 5 minutes.
Add onions to skillet and saute for 2 minutes until softened.reduce heat to medium low and cook stirring for 8 minutes or until onions are very soft and lightly browned.. whisk flour into milk and gradually add to skillet, simmer and stir for 3 minutes or until thickened stir in vinegar and syrup...spoon onions onto plate, top with pork and sprinkle with parsley and cilantro.