The Belgian take on the gyro (or doner kebab)

During my stay in Brussels, I've come to the conclusion that the ubiquitous Middle Eastern kebab houses are far superior to traditional Belgian cuisine. I'm sure that there are plenty of excellent Belgian restaurants but the prices in Brussels are obscene! For 5 euros, there is NO Belgian place that can match the flavor of doner kebab.

However, there is an obvious Belgian twist as you can see in the picture above. Often, pitas are served with fries stuffed inside. It is a remarkably tasty combination, although you can get fries on the side instead. Anyone have other ideas for non-traditional things to stuff in a gyro?