Prepare the Roast. Start by seasoning the chuck roast generously with salt and pepper. Heat olive oil in a large skillet over medium-high heat. Sear the roast on all sides for about 2-3 minutes per side until a golden-brown crust forms. This step is optional but highly recommended as it helps lock in the flavor.
Layer the Vegetables. While the roast is searing, prepare your vegetables. Place the onions, carrots, and potatoes in the bottom of the slow cooker. These will soak up the juices from the roast, making them tender and flavorful.
Add the Roast and Broth. Once the roast is seared, place it on top of the vegetables. Add the garlic, fresh herbs, and Worcestershire sauce. Pour the beef broth over the top, ensuring the roast is mostly covered.
Slow Cook. Cover the slow cooker and cook on LOW for 8-10 hours or on HIGH for 4-5 hours. The roast is done when it’s fork-tender and easily falls apart.
Serve. Carefully remove the roast from the slow cooker and let it rest for 5-10 minutes. Serve with the tender vegetables and a drizzle of the broth for extra flavor.
For a thicker gravy, remove about 1/2 cup of the broth from the slow cooker, mix it with 1 tablespoon of cornstarch, and stir it back into the slow cooker. Let it simmer for a few minutes until thickened.