Spray slow cooker with non-stick cooking spray. Place chicken breasts into base of slow cooker. Sprinkle chicken breasts with salt and pepper and garlic powder.
In small bowl, combine applesauce, cider vinegar and cinnamon. Pour over the chicken breasts. Set slow cooker on high and cook for 6 hours, or low for 8 hours.
Cook acorn squash, same method as you cook butternut squash. Takes about 45 minutes to bake, so start at the same time as you start the rice to get them both on the table at the same time! Sprinkle sugar and butter onto cooked squash, before serving.
In medium saucepan, bring 2 cups of water to a boil. Add 1 cup of brown rice and 1/2 cup of apple juice. Bring to boil, then reduce heat and cover. Simmer for 45-50 minutes, or until brown rice is fluffy.
Serve Slow Cooker Applesauce Chicken with Sweetened Acorn Squash and Brown Rice.