Give everything (meat, onion and bread soaked and well drained) through the meat grinder.
Here I used breadcrumbs instead of bread, I put it directly in the chopped onion with meat.
Put in a deeper bowl, add eggs, semolina, salt and pepper, then mix well for 10 minutes with your hands, until you notice that all the ingredients have been incorporated. If the mince is too hard and dry, add more eggs, one by one, after each one, make sure to check if the mince is soft and elastic.
If you think it is too liquid, stir and beat the table / bowl with it 5-10 times, to mix better.