Preheat the oven at 350 degrees Fahrenheit.
Clean & prep the chuck roast. Pat dry with a paper towel, then drizzle a little bit of olive oil on to the roast.
Season the meat with the garlic powder, black pepper, & the McCormick salt free onion & Herb seasoning. (Rub the seasonings onto the roast)
Flip the roast over and season the other side as well.
On medium high heat, add some olive oil to an oven safe skillet or Dutch oven.
Allow the oil to get hot, then add the roast to the pan.
Brown the roast on one side, then flip over and brown the other side.
Once the meat is browned, remove it from the pan.
Add the sliced onion & sauté for 2 to 4 minutes.
Add the fresh minced garlic & sauté for 1 minute or until it becomes fragrant.
Add the beef broth, ranch packet, and the Au jus gravy packet to the pan. Mix everything together.
Place the meat back into the pan, add the peppers & unsalted butter.
Put an oven safe lid or aluminum foil on top of the pan and place the pan in the oven.
Bake @ 350 for 2 1/2 to 3 hours or until the pot roast is tender & fully cooked to a safe temperature for consumption.
Once the meat is done, remove it from the oven. Take two forks and shred the beef.
Serve with your favorite side dish like mash potatoes, rice, or veggies. Enjoy!