Spicy Beef Lettuce Wraps
This travel-friendly meal tastes great cold, but the filling can easily be heated up in the microwave, if you prefer. The acid in the vinaigrette will continue to cook the steak, so don't stir it together until you're ready to eat. To keep the lettuce crisp, wrap it in damp paper towels and refrigerate it in a separate airtight container or plastic bag.