I feel for you! Its not easy. Do you use canned food or make some of your own? i found that when I went from the pureed canned food to the mashed ones Noah gagged too, so i had to whizz them. But with making my own food it wasnt so much that i increased the lumps as such, more that I didnt add as much liquid to the food to make it smoother, I gave him thicker food and then slowly started with lumpier bits, I found that pasta was quite good as a lumpy food. i use one of those stick blenders so you can see how much you are blending it.
hey i could bable all day! Email me if u like,
feel free to ask me any questions, Im not an expert but I like to talk!!!!
Keep smilin smile
jes and Noah