INGREDIENTS 6 tbsp. extra-virgin olive oil, divided 1 red onion, thinly sliced into half moons 1 tsp. balsamic vinegar 1 tsp. brown sugar kosher salt Freshly ground black pepper 1 lb. skirt steak 2 tbsp. red wine vinegar 1 5 oz. container of baby arugula 1/2 pt. red grape tomatoes, halved lengthwise 1/2 pt. yellow […]