Take your gooey grilled cheese to the next level with leftover flank steak.
Cook's Note:For the Flank Steak with Chimichurri recipe, click here.
Heat a frying pan over medium heat. Butter the sourdough bread. Place a slice, butter side down in the pan and arrange the cheese and steak on top. Top with the other slice, butter side up. Cook the sandwich until the cheese nearly melts and the bread is golden brown on both sides.
Place the sandwich in an airtight, glass container to transport to work. Bring a tablespoon or more of chimicuhurri in a separate container. Reheat sandwich in the office toaster oven and add sauce before enjoying.