Here is what I did:
1-1/2 lbs. beef roast (chuck or round)
1 large onion, sliced
8 oz. can diced green chilis
2 beef bouillon cubes
1-1/2 teaspoon dry mustard
1/2 teaspoon garlic powder
1 teaspoon seasoning salt
1/2 teaspoon pepper
1 cup salsa
I used a 2 lb. boneless chuck roast. Brown it over med-hi heat on both sides. As you turn to brown the second side add the sliced onions and other ingredients to the pan. Add just enough water to barely cover the meat.
Cover the pot and simmer on low heat about 2 hours, or until beef is tender. It will depend on the size of the roast. Drain and reserve liquid. Shred the beef using 2 forks to pull it apart. It should come apart easily. Combine beef, salsa, and enough of the reserved liquid to make of desired consistency.
Use the meat to make tacos, burritos, or other dishes where you want a flavorful, but not too spicy beef. I add the leftover juice to my next pot of soup or chili for a tasty broth.