For the sauce, sweat the finely chopped onion in a little oil until translucent. Deglaze with the stock and cream. Add ajvar and season with salt, pepper and paprika to taste. Let the sauce reduce a little.
Meanwhile, cut the pointed peppers in half lengthways, remove the seeds and the white partitions, rinse and pat dry. Season the mince and mix it with the feta cheese cut into small cubes. Pour some of the mixture into each half of the pepper.
Put the sauce in an ovenproof dish. Put the filled peppers in it and bake in the preheated oven at 200 degrees for about 30 minutes.