What are these chunks doing here?

We gave Liam his first finger foods tonight... chunks of cooked sweet potato! He was curious and really loved banging the food on his tray. He snagged several pieces with his newly acquired pincher grasp, but none made it to his mouth. I gave him a couple pieces and he did well with them... chewing motions and all! I also smashed some sweet potato with his pears (rather than pureeing it in the food processor) and he did very well with that! Only one gag and one small piece spit out! He will be on his way to 'big people' food in no time!