Ingredients
For the Steak:
For the Pepper Relish:
Pierce the flank steaks with a fork or paring knife a few times on both sides. Place the steaks in a 1-gallon zip-top bag. In a small bowl, whisk together the brown sugar, mustard and soy sauce. Season with salt and black pepper. Pour the marinade over the steaks and let sit at room temperature for 1 hour.
Preheat a grill to medium high.
Remove the steaks from the bag (discard the marinade). Put the steaks on the grill and cook, covered, until nicely charred and medium rare (130°F), about 4 minutes per side.
Transfer the steaks to a cutting board to rest, loosely tented with foil, for about 10 minutes.
While the steaks are resting, make the pepper relish: Heat the olive oil in a medium skillet over medium heat. Add the bell peppers, onion, jalapeño and garlic and cook, stirring, until the vegetables are softened, about 5 minutes. Add the vinegar and lime juice and bring to a simmer. Reduce the heat and cook, stirring occasionally, until reduced, about 5 minutes. Remove from the heat and stir in the honey, cilantro, the remaining 4 tablespoons olive oil, and the lime zest.
Slice the steaks thinly against the grain, top with pepper relish and serve.
