01 - Preheat your grill to high heat.
02 - In a shallow dish, whisk together olive oil, kosher salt, black pepper, cumin, smoked paprika, minced garlic, and lime juice. Add the flank steak, turning to coat thoroughly. Let marinate at room temperature for 15–20 minutes.
03 - While the steak marinates, place poblano peppers on the grill over direct heat. Turn frequently until the skin is charred and blistered on all sides, approximately 5–7 minutes.
04 - Transfer charred peppers to a bowl and cover tightly. Let steam for 5 minutes, then rub off the blistered skins. Remove stems and seeds, then dice the flesh.
05 - In a mixing bowl, combine diced poblano peppers, cherry tomatoes, red onion, jalapeño, cilantro, lime juice, salt, and pepper. Toss gently to combine and set aside.
06 - Place the marinated flank steak on the hot grill. Cook for 5–6 minutes per side for medium-rare, adjusting time to reach desired doneness.
07 - Transfer the cooked steak to a cutting board and let rest for 5 minutes. Slice thinly against the grain for maximum tenderness.
08 - Arrange steak slices on plates and top generously with the poblano pico de gallo. Serve immediately.