To create the sauce, gently boil the canned tomatoes, harissa, and a pinch of sugar in a small saucepan over medium heat for 20-25 minutes, or until everything is reduced; then let cool.
Combine the lamb mince, 2 eggs, parsley, onion, garlic, and chilli flakes in a large mixing bowl and knead the meat into an equally blended paste with clean hands.
Make 24 smooth balls out of the mixture.
The simplest method to accomplish this is to weigh the entire mixture, split it by 24, and then weigh out the tiny balls to nearly the same weight.
Lay the pastry sheets out on a lightly floured work surface and cut 12 squares from each sheet. Each square should be around 8 × 8 cm in size.
Preheat your oven to a temperature of 180°C/360°F fan
Place a small kofta ball in the center of the pastry and pull the opposite corners of the dough over the kofta, pinching the pastry to seal it over the meat. Place on baking sheets.
Glaze the crust with a little beaten egg, sprinkle the tops with nigella seeds, and bake for 25 minutes, or until the pastry is crisp and golden brown.
Heat the tomato sauce, then blend the yogurt with 3 tbsp tahini and season with salt and pepper.
Using lukewarm water, thin the mixture to the consistency of double cream.
Drizzle tahini and tomato sauce over each puff and serve immediately.
Serve and enjoy your dish!