01 -
Add diced onion, diced orange bell pepper, and diced celery into a 5-6 quart slow cooker.
02 -
Position the beef chuck roast on top of the layered vegetables in the slow cooker.
03 -
For enhanced flavor and color, heat a large skillet with a small amount of oil over medium-high heat. Brown the roast for 2 minutes on each side before transferring to the slow cooker.
04 -
In a bowl, whisk together minced garlic, tomato sauce, barbecue sauce, Worcestershire sauce, beef bouillon cubes, dried thyme, and water until well combined.
05 -
Pour the prepared sauce mixture evenly over the roast and vegetables in the slow cooker.
06 -
Cover and cook on low heat for 6 to 8 hours without removing the lid to ensure tender, shreddable meat.
07 -
Once cooked, optionally garnish with chopped parsley and serve the roast over mashed potatoes.