Simple Beef Pot Roast

Preheat the oven to 275 degrees F (135 degrees C).

Pour vegetable oil into a large oven-safe pot over medium-high heat.

Season the chuck roast with salt and black pepper.

Brown the meat on both sides in the hot oil, and transfer to a plate.

Stir carrots, celery, and onion into the pot, and cook and stir until vegetables start to release their juices, about 3 minutes; loosen any brown flavor bits on the bottom of the pot.

Add butter, and cook until the onions are translucent, about 5 minutes.

Then sprinkle in rosemary, stir the vegetables, and return the roast to the pot.

Cover the pot with a lid.

Roast in the preheated oven until the chuck roast is tender, about 2 1/2 to 3 hours.

Season vegetables with additional salt and black pepper, if desired.