medium red onions • olive oil • arugula • flat-leaf parsley leaves • soft goat cheese, broken into 1/2- to 1-inch chunks • Flaky salt and freshly cracked black pepper • walnuts, coarsely chopped (make sure they're not bitter or rancid) • fresh red bell pepper (71 grams), or 1 red chile (e.g. Thai bird's eye), seeded and finely chopped • garlic, minced • red wine vinegar • olive oil • Kosher salt