Crockpot Shredded Beef Tacos for a Crowd

1 white onion, diced

3 lb. beef chuck roast

1 c. beef broth

4 oz. tomato paste

1 t. cumin

1 T. chili powder

1/2 t. salt

12 tortillas or tacos

cotija cheese, feta or romano may be substituted

cilantro, optional

diced onions, optional

shredded lettuce

diced tomatoes

sour cream

Lay onions in lined crockpot. Lay chuck roast on top of onions. Combine broth, tomato paste, and seasonings. Pour over roast and cook on low for 8 hours. Once meat is cooked, shred with two forks in the tomato and broth mixture. Place in tortillas and top with toppings of your choice.