Place cubed squash, 2 cubed apples, and onion into bottom of crockpot. Season with salt & pepper.
Sprinkle pork tenderloin with salt, pepper, and paprika and on all sides. in a skillet add 1 TBS oil and heat to a medium high. Add pork tenderloin and brown to a nice color on all sides. Let rest.
Mix brown sugar, soy sauce, chicken stock together.
Cut 8 slices into tenderloin going about 1/2 way down.
Place each slice of apple into each cut of the tenderloin.
Place tenderloin onto vegetables in crockpot.
Add rest of vegetables to sides of tenderloin.
Pour sauce over vegetables and tenderloin.
Cover crockpot with lid and cook on high for 5-7 hours or low for 6-8 hours until desired tenderness is reached for vegetables and tenderloin.
Serve and enjoy.