Place the steak in a crock pot. Rub the olive oil over the steak.

Then mix together the garlic, chili powder, paprika, salt, pepper and cumin together in a small bowl. Rub this mixture over the steak.

Then top with the lime juice from 2 of the limes, chopped cilantro and diced onions. Pour the beef broth around the steak in the crock pot.

Cover and cook on low for 6-8 hours or cook on high for 3-4 hours.

After the cook time, shred the beef and top with the remaining lime juice from the other lime.

Then melt the butter in a large skillet or on a griddle. Fry the mini corn tortillas in the melted butter for 1 minutes or until the tortillas are soft.

Allow them to cool slightly. Then top the mini tortillas with the beef and your favorite taco toppings.