Trim the chuck roast of as much fat as possible. Season both sides of the chuck roast with the steak seasoning, sea salt, and freshly cracked pepper to taste.
Heat the olive oil in a large Dutch oven over medium-high heat. Sear the meat on both sides for a few minutes until nice and brown.
Deglaze the pan with beef broth, balsamic vinegar, and tomato paste. Cook for 2 minutes to reduce a little.
Add the onions, garlic, and bay leaves, then cover with a lid and place it in the oven. Cook the pot roast for 3-4 hours, or until tender. (If you can, flip the meat halfway through cooking.)
Remove the pot roast and place it on a cutting board with a foil tent.
While the meat is resting, remove the bay leaves from the balsamic and onion sauce and skim as much fat from the top of the sauce.
Place on the stove over medium-high heat and cook for 2-3 minutes, until it has reduced.
Slice the pot roast and drizzle with the balsamic onion sauce. Enjoy.