Sunday dinner energy in its purest form. This pot roast falls apart at the touch of a fork, surrounded by caramelized root vegetables that soaked up all those juices.
Preheat oven to 300°F. Pat beef chuck roast dry and season generously with kosher salt and black pepper.
Heat olive oil in a large Dutch oven over medium-high. Sear the roast on all sides until deep brown, about 3–4 minutes per side. Remove beef and set aside.
Add the onions, carrots, parsnips, potatoes, and celery to the pot. Sauté for 5 minutes, stirring occasionally, to get some color.
Push the vegetables aside and add tomato paste and garlic. Sauté 1 minute, then pour in beef broth, scraping up browned bits.
Return beef to pot on top of the vegetables. Add fresh thyme and rosemary. Cover tightly and roast in the oven for 3 hours, flipping beef halfway through.
Remove lid for the last 30 minutes to allow vegetables to caramelize and sauce to reduce. Check tenderness: the roast should fall apart easily. Rest 10 minutes before serving, spooning vegetables and pan juices over slices of beef.