This simple, stylish potato rosti with embellishments makes for a delightful lunch or dinner with a definite wow factor. It's simple because you buy the burger already made - and you can also substitute the suggested potato burger with a sweet potato or red lentil burger version. Yum! They're also available gluten, wheat and onion free. You can also cook this dish on an indoor grill rather than a barbecue - and even omit the chicken for an equally delicious vegetarian version. It's very versatile.