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 grape tomatoes, halved lengthwise

2 oz. Feta, crumbled

Preparation

Step 1In a large skillet over medium-high heat, heat 1 tablespoon olive oil. Add onion and cook until soft, 5 minutes. Add balsamic vinegar and brown sugar, and continue to cook for another 2 minutes, until very soft. Season with salt and pepper, then remove to bowl and let cool.Step 2Rub grill pan with 1 tablespoon olive oil and heat over high heat. Season skirt steak generously with salt and pepper, and grill steak for 3 minutes per side for medium rare. Remove steak to cutting board and let sit for 5 minutes.Step 3In large bowl, whisk together red wine vinegar with remaining 4 tablespoons of olive oil, then season with salt and pepper. Add arugula and tomatoes to vinaigrette and toss gently to combine. Step 4Thinly slice steak diagonally across the grain.Step 5Divide salad mixture among 4 plates. Top each with caramelized onions, steak, and crumbled feta, and serve immediately.