Preheat the oven to 275F degrees.
Heat a cast iron dutch oven on medium-high heat on the stove.
Add 2 tablespoons of beef tallow and wait until the oil is well-heated.
Place the roast in the oil and sear it on one side for 4 minutes.
Flip the roast over and sear it on the other side for another 4 minutes.
Sear the edges until golden brown.
Take the roast out of the dutch oven and set it aside.
Add chopped onions and minced garlic to the dutch oven and saute them on medium heat for 3 minutes.
Add the roast back to the dutch oven with the onions and garlic.
(Optional) Add carrots (and other vegetables or herbs)
Pour beef broth over the meat.