I only read a few posts, so forgive me if I am being redundant ;)
Make your own chicken strips. Cut a breast into strips, moisten it with a little water, egg or ranch, then roll in a mix of panko bread crumbs and parmesan. Maybe some parsley too if he's game. Bake for a little while and voila! You have chicken strips the whole family will enjoy! I'm sure you could do this with fish, zucchini, etc. If he likes spaghetti, try spaghetti squash with some marinara sauce. YUM!
With my 2 YO DD, sometimes I can get her to eat stuff just by making it look fun. For example, on the rare occasion that I give her a hot dog, I will cut it in half, then quarter the halves so I have 8 sticks. I put some ketchup in the middle of a plate, then have the sticks poking out from it like rays of sun. She loves it!