Flank Steak with Caramelized Onions and Balsamic Glaze
The reduced balsamic vinegar sauce gives the flank steak a unique flavor that pairs perfectly with the caramelized onions. Both the steak and onions contribute a hefty dose of potassium to this entrée--766 milligrams in each serving. Serve with steamed broccoli or asparagus, and drizzle some of the glaze over the vegetable.