Preheat oven to 400°F (204°C).
Blend onion and garlic until smooth and transfer to a bowl.
Add beef, tomato paste, yogurt, spices, salt, and pepper and mix well.
Divide into 3 portions.
Roll each portion thin between parchment into rectangles.
Roll tightly into logs and place on a sheet pan.
Add tomatoes and peppers, drizzle with olive oil, and season.
Bake for 20 minutes.
Unroll the meat and tear into chunks to create the classic Viral Doner Kebab Recipe texture.
For sauce, melt butter, add tomato paste and water, bring to a boil, then remove.
Assemble wraps with bread, sauce, meat, vegetables, and onions. Roll and slice.