First, season all sides of the roast with salt, pepper, garlic powder, onion powder, and oregano.
Next, place onions in the slow cooker and season with pinch salt and pepper.
Now, add the seasoned roast ontoo of the onions. Fat side up so it bastes the beef.
Next, mix all the tsimis ingredients and pour on top of the roast. Leave in the fridge overnight so seasonings can go throughout the meat.
Finally turn the slow cooker on high for 6 hours. Enjoy!