I’ve been doing a similar thing as well. Instead of taking the kids to McDonalds for Chicken Nuggets, I actually made my own. I started by finely chopping up roasted veggies (This helps make it a little sweet) and then mix with bread crumbs, and obviously minced chicken. I place the mixture in a zip-lock bag, cut off the tip and pipe the mixture out onto cooking trays. Then, I bake them in the oven.
The kids love it! And now, they eat veggies plain!