The science behind the pairing is fascinating. Onions are high in sulfur, which provides pungency, but they are also packed with natural sugars that emerge during caramelization. Apples provide acidity and a different type of sweetness (fructose).
Apple Onion
Pork and apples are a legendary duo, but adding sautéed onions takes the dish to a professional level. Sauté sliced onions until golden, add sliced apples and a splash of apple cider vinegar, and serve over a seared pork chop. The onion provides the "umami" that fruit alone lacks. 2. Apple-Onion Confit Apple Onion