Place all the vegetables on the bottom of a slow cooker.
1 rutabaga, 2 sweet potatoes, 3 to 4 carrots, 1 onion
Generously season the chuck roast to taste with salt and pepper.
3 to 4 lbs. chuck roast, Sea salt and freshly ground black pepper
Melt cooking fat in a skillet over high heat, and brown the roast for 2 to 3 minutes per side.
Cooking fat
Place the roast over the vegetables in the slow cooker; deglaze the pan with the wine and bring to a light boil. Add the garlic, stir and cook for 4 to 5 minutes.
4 garlic cloves, ¼ cup red wine or replace with extra beef broth
Add the beef broth, bay leaves, fresh parsley, and thyme to the skillet. Stir thoroughly, and then add the sauce to the slow cooker.
2 tbsp. fresh parsley, 2 bay leaves, 3 cups beef broth, 1 tbsp. fresh thyme
Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours.
Pour the liquid at the bottom of the slow cooker into a saucepan using a strainer.
Bring the sauce to a light boil, mix tapioca starch with ¼ cup cold water, and gently pour in the sauce while whisking; cook for 4 to 5 minutes or until thickened.
¼ cup tapioca flour
Serve the roast with a generous drizzle of sauce on each slice.