Knead the mince well in a deep container and to it add the 2 slices of bread, which you've soaked in water and drained ahead of time. Stir for 5 min.
Add the onions, garlic and egg which you've mashed in a blender. Stir the mince once again for several min.
Add the spices, stir again and add the semolina and baking soda. Knead the mince for 10 min., while soaking your hands from time to time.
Cover the container with mince with plastic wrap and leave it in the fridge for 24 hours. From the seasoned mince, form small meatballs.
Fry in preheated oil until reddened.