S.H.
At this age... a baby will NOT know how to portion food, nor in his mouth.
Put it this way, even 2 year olds and 3 year olds do that.
Over stuff their mouth.
Even a Teenager will do that.... but by this age they know better.
You cannot 'teach' him, nor expect him at his age to 'know' this.
So you have to always supervise while he eats... due to choking dangers... and if they aspirate their food. Which can happen.
As he gets older, he will learn. Just not yet.
Keep food pieces real small... and no hard foods. It is a choking hazard.
Keep foods small or foods that will melt in the mouth right away.
Also, bread, is a choking hazard, because the longer it is in the mouth, it gets 'gummy' and can can get stuck in the throat. Causing suffocation.
Yes, meal time is tedious at this age and throughout toddler-hood. Because they are not yet, self-reliant and cannot self-gauge eating, at-will.
He is so young.
As he eats, wait until he has chewed and then swallowed what he already has in his mouth before giving him more.
ALSO, what I taught my kids is, when they were older babies/toddlers, is that if they have too much food in their mouths and cannot then talk or swallow it... they HAVE to tell me... or point to their mouth and throat.... so that I know they are in trouble or cannot swallow. AND I taught them to simply spit out their food when too much in in their mouth. AND I would not scold them for that. To me, their safety is more important. But both my kids did over-stuff their mouths when younger toddlers/babies.
But again, your baby is too young to portion foods and in his mouth at-will yet, or understand completely.
all the best,
Susan