Pat your beef chuck roast dry with paper towels and generously season it with salt and pepper.
Heat 2 tablespoons of olive oil in a large skillet over medium-high heat. Once hot, sear the roast on all sides until it develops a rich, brown crust—about 3-4 minutes per side.
Place the chopped onion, sliced carrots, sliced celery, and quartered potatoes in the bottom of your slow cooker.
Nestle the seared roast on top of the vegetables.
Sprinkle the minced garlic, dried thyme, and dried rosemary over the meat and vegetables.
Pour in 4 cups of beef broth and 1 tablespoon Worcestershire sauce.
Cover and cook on low for 8 to 10 hours or on high for 4 to 5 hours until meat is tender and vegetables are soft.
Once cooked, remove the roast and vegetables carefully. Let the beef rest for a few minutes before slicing or shredding.
Optionally, strain the cooking liquid and simmer it on the stove to reduce into a thick gravy.
Serve your Slow Cooker Pot Roast with a dollop of Horseradish Sauce for a zesty kick.