maybe remove the breadcrumbs from the chicken (and de-bone if necessary). Using medium-sized pieces, lightly fry the chicken, push it to the side in the pan, then add carrots and celery to be sauted too. If you like, you can add a can of tinned tomatoes when the rest is cooked and mixed together.
Make potato and squash mash to serve with the meat mix.
You don't say if your left-overs are raw or already cooked, but the above should work for either.