Sear the Roast: Heat a large skillet over medium-high heat and add the olive oil. Season the pot roast generously with salt and pepper on all sides. Once the oil is shimmering hot, add the roast to the skillet. Sear each side for approximately 3-4 minutes until a rich, brown crust forms. Carefully remove the roast from the skillet and set it aside on a plate to rest.
Sauté Onions and Garlic: In the same skillet, add the thinly sliced onions. Reduce the heat to medium and cook, stirring occasionally, until the onions are soft and beautifully caramelized, about 15-20 minutes. Add the minced garlic and sauté for an additional 2 minutes until fragrant.
Prepare the Slow Cooker: Layer the bottom of your slow cooker with the caramelized onions and garlic, spreading them evenly to create a flavorful base.
Add the Roast: Position the seared pot roast squarely on top of the onion mixture in the slow cooker.
Make the Broth Mixture: In a mixing bowl, whisk together the beef broth, balsamic vinegar, thyme, bay leaves, and season with salt and pepper. Mix thoroughly, then pour this delightful mixture over the roast in the slow cooker, ensuring it's well coated.
Cook the Roast: Cover the slow cooker with its lid, and cook the pot roast on low for 8-10 hours or on high for 4-6 hours. It’s ready when the beef is fork-tender and shreds easily.
Add Cheese: About 30 minutes before the cooking time is up, lay the slices of Swiss or Gruyère cheese evenly over the roast. Cover again and let the cheese melt beautifully.
Shred and Serve: Once fully cooked, transfer the pot roast to a cutting board. Use two forks to shred the beef into bite-sized pieces. Return the shredded meat to the slow cooker, mixing it well with the sweet onions and flavorful broth.
Garnish and Enjoy: Spoon the succulent pot roast into bowls, making sure to include ample onion and broth. Sprinkle chopped fresh parsley over the top for a touch of color and freshness.
Notes
Serve with a crusty baguette or mashed potatoes to soak up the broth.