Slow-Cooked Shredded Beef Tacos

Ingredients:
1 packet of taco seasoning mix
1 1/2 lbs. beef chuck roast
1 med. onion, sliced
1 c. water
1 can (4 oz) diced green chiles
1 packet (3 oz) taco sauce
Tortillas

Optional toppings:
shredded lettuce
chopped tomatoes
shredded mild cheddar cheese
sour cream

Directions:
Place beef and onion in slow cooker.  Combine water and seasoning mix in a small bowl.  Pour over beef and onion.  Cover and cook on low for 6 to 8 hours or until fork tender.
Transfer beef to cutting board. Shred beef with two forks.  Place in large bowl.  Stir in taco sauce and chiles.
Fill warm taco shells with beef mixture.  Top with desired toppings.