Preheat grill to high; pat steak dry, season generously with salt and pepper, and grill 4โ5 minutes per side for medium; rest 5 minutes.
Dice bell pepper; mince cilantro and garlic; stir together sour cream, cilantro, garlic, and lime juice with a pinch of salt for crema.
On the grill or in a hot skillet, char corn and diced pepper together 5โ6 minutes, stirring often, until corn browns slightly.
Season corn succotash with salt, pepper, and a squeeze of lime juice.
Slice steak against the grain and serve topped with cilantro crema alongside the succotash.
Photo: Baiyang Huang / Unsplash