Heat a large cast-iron skillet over medium-high to high heat. Add a tablespoon of oil and cook beef in single layer to brown and crisp, 2 to 3 minutes on each side. Season with salt and remove to platter. Add another tablespoon of oil, and add onions and peppers, toss, and cook for 3 minutes. Add ginger and garlic, and toss a minute more. Add beef back to pan, sprinkle in spice blend, toss to combine with peppers, and add apple cider vinegar. Garnish beef with cilantro. Serve beef with rice.