3 year old is the pickiest eater I’ve ever seen. Making “squeezy fruits?”

My 3.5 year old stepson will not eat a damn thing. We’re limited to chicken nuggets, pancakes, applesauce, and strawberries. Literally won’t eat anything else. He will, however, eat the pureed baby food pouches, thinking it’s applesauce. So I bought a set of reusable pouches and a small blender.

Question is, what to put in it? Anybody have any good “recipes” that have worked for your kid? I’m looking to incorporate vegetables and proteins as he severely lacks in those departments.