Slow Cooked Mexican Beef Wraps

Ingredients:
1 large onion, halved and sliced
1 (2 1/2-3 lb.) beef round rump roast
2 tsp. fajita seasoning
1 Tbsp. instant beef flavor bouillon granules
1 c. chunky salsa
10 large flour tortillas, warmed
Shredded cheese, sour cream and lettuce, optional

Directions:
In a 3-6 qt. slow cooker, layer onions on the bottom.  Coat roast evenly with seasoning and place on top of onions with any additional seasoning.  Sprinkle with bouillon and top with salsa.  Cover and cook on low 7-9 hours or until very tender.  With 2 forks, pull beef into shreds; mix well with sauce.  Serve in tortillas with cheese, lettuce and sour cream, if desired.