Preheat the slow cooker to sear/high.
Add the bacon to the slow cooker and cook until browned and crisp. Set aside.
Add the beef into the slow cooker. Season with salt and pepper and sear until golden brown on all sides.
Remove the beef and add the carrots, onions, and garlic to the slow cooker and cook until lightly browned, about 4 to 6 minutes.
Next, add the beef back in and sprinkle in the flour. Mix until combined.
Add the red wine, beef stock, tomato paste, crispy cooked bacon, and parsley and thyme sprigs into the slow cooker and change the setting to slow cook/high for 2 hours.
With 30 minutes left in the cooking process add a large saute pan to a burner over high heat.
Add the butter to the pan and once melted add the mushrooms and cook until golden brown, about 5 to 7 minutes. Add the onions in and cook for 3 to 4 more minutes.
Once browned pour the contents from the pan into the slow cooker and mix in. Serve the boeuf bourguignon with the cooked pappardelle pasta, sliced sourdough and chopped herbs.