1. Warm flatbread in a low oven or on a warming tray.
2. Spread cooked onions evenly over flatbread. Add cooked beef, spreading to cover. It’s okay if every area is not covered with both onions and meat, but it should be fully scattered and not sparse.
3. Drizzle decoratively with barbecue sauce and creamy dressing (see below). Sprinkle with fried onions and top with a few soft-cooked eggs (see below) and chopped chives. Serve warm or at room temperature.