1: Preheat oven to 400°F.
2: Season ground beef with shredded onion, yogurt, and all the spices; mix well and spread over 4 parchment papers with a rolling pin; roll them up and roast for about 30 minutes.
3: Remove from parchment paper and cut into pieces.
4: To make the sauce, mix all sauce ingredients together.
5: Assemble the doner with the sauce and enjoy.
