Season the roast with the salt and pepper and brown in the oil in a frying pan.*
Place in crock pot.
Combine remaining ingredients and pour over roast.
Cook on low for 8-10 hours or on high for 6-7 hours.
Remove from crock pot and shred beef with a fork removing any fat along the way.
Serve on your choice of tacos with all the fixin’s.
Ole’!
If you are pressed for time I have omitted this step and it’s been wonderful. Browning add a bit deeper flavor and kick starts the cooking process but it is not necessary.
Recipe by Mr. Farmer's Daughter at http://www.mrfarmersdaughter.com/spicy-shredded-beef-tacos/