Directions:
Combine chili powder, cumin, oregano and ½ tsp salt into a small bowl. Rub spice mixture evenly over flank steak to coat.
In a large skillet, heat oil over medium heat. Add steak; cook until browned on one side, 5-8 minutes. Turn; cook until browned on other side, 5-8 minutes for medium rare (reduce heat if browning too quickly). Remove steak from skillet; let rest at least 5 minutes before slicing.
To slice, use a sharp knife and slice thinly against the grain for the tenderest pieces.
In a medium bowl, whisk together salsa and vinegar; season with salt and pepper. Add arugula; toss to coat with dressing. Divide among four plates; serve with steak, and crumble goat cheese over the top.
Serve with Tomato Avocado Toasts
To make this dish even lighter, use the broiler. Coat the rack with nonstick cooking spray, and cook the steak, turning once, about nine minutes total for medium rare.
Rinse the arugula in cold water. This spicy green grows close to the ground and can be sandy. Pat dry or use a salad spinner to prevent a soggy salad.