Soak the bun in water. Roast the sesame seeds in a pan until golden brown.
Knead the minced meat with the egg, well-squeezed bun, sesame seeds, sesame oil, onions, garlic, ginger, parsley, chilli strips, mustard, pesto and the spices. Season to taste and, if necessary, add seasoning. The meat mixture should taste a bit spicy, as it gets a little milder when baked. If the meat dough is not firm enough, add some breadcrumbs. Shape the meat dough into small balls or larger meatballs and fry them in a pan in a little oil on both sides and cook through.