My son has had a bit of an issue with texture for the last year; he'll spit out his food as soon as he feels something in addition to the pasta he's eating for

My son has had a bit of an issue with texture for the last year; he'll spit out his food as soon as he feels something in addition to the pasta he's eating for instance, but blend it all up into a sauce and no problem. Thankfully it seems to just be a "stage", as it appears to be improving as he gets older.