Add vegetable oil to a pot and allow it to heat. Then, add the stew beef, cumin, turmeric, and ¼ cup tomato paste.
Add the finely diced onions and the 14 oz can of tomatoes. Stir. Cover and cook on medium heat for 2 hours.
After 2 hours add berbere spice, garlic, and butter. Cover and cook for another 5 minutes.