Girls, how do you give your babies "pieces"?

Girls, how do you give your babies "pieces"? In our age we can already, ? we have 5 teeth. But the daughter doesn't like eating with pieces so much, she always gets choked, and when I take off the diaper I often notice that there are leftovers of vegetables. Is this normal? Read articles about self-feeding, they say that from 6 months old you need to teach them to eat in pieces ?