If you haven't already, trim the bulk of the fat from the chicken thighs. It's ok to leave some as this does help the flavor. WW might not agree with that but I do!
Sprinkle the spices evenly over both sides of the chicken thighs.
Slice the onion thinly, then core and slice the apple. Cube the squash if you haven't already. I used frozen cubed butternut squash and it worked nicely. Sometimes the trip the market just isn't worth it. Scatter the onion in the bottom of a slow cooker; top with the squash, and arrange the chicken on top. Top the chicken with the apples.
In a bowl (or a liquid measuring cup), whisk together the stock, mustard, and vinegar. Pour this over the chicken mixture.
Cover and cook until the chicken and vegetables are tender, 6 to 8 hours on Low or 4 to 5 hours on High.
One serving is supposedly one thigh and a cup of the squash, onion, apple mixture. The thighs I had seemed very small so I had two.
This makes SO MUCH delicious juice! I highly recommend cooking some potatoes, pasta (I'm obsessed with hearts of palm pasta), or rice/riced cauliflower to go with it. Enjoy!