In large skillet, cook bacon over medium until browned, about 10 minutes. Transfer to paper towels, leaving 1 tsp. fat in skillet. Add panko; season. Cook panko, stirring often, until golden, about 2 minutes. Transfer to plate. In same skillet, cook collard leaves, stirring occasionally, until tender, about 6 minutes. Stir in bacon, peppers, and brine; season. Top with panko.