the only way i can think to do it is to prep 1 day ahead.
roast bone-in chicken parts and a whole bunch of veggies : prep the chicken, add salt and pepper. toss onions, carrots, beets, parsnips, celery, garlic with oil. spread veggies and chix on a roasting sheet and cook. add some beet greens, leeks, and cabbage halfway through roasting time.
once cool enough to handle, shred the chicken.
then scrape the whole business into a container and refrigerate overnight. next day, dump it all into a stock pot with water, some white wine, and cover. bring to a boil, reduce heat to a simmer, and make kneydl.