Crockpot Beef and Bean Burritos

2 lb. london broil
1 pkg. taco seasoning
1 cup onion, chopped
1 T. vinegar
1 small can chopped green chiles
1 can refried beans
12 tortillas
1 1/2 cups monterey jack cheese, shredded
1 1/2 cups chopped plum tomato
3/4 cup sour cream

Trim fat from the meat, rub taco seasoning on both sides. Place in slow-cooker that has been sprayed with cooking spray. Add onion, vinegar and green chiles. Cover and cook on low for 9 hours. Remove meat from slow cooker, reserving liquid. Shred beef with two forks. Combine meat with reserved cooking liquid. Stir well.

Warm beans and tortillas according to package directions. Spread 2 . beans down middle of each tortilla. Spoon a heaping 1/3 cup meat mixture on top of beans. Top each with 2 T. cheese, 2 T. tomato, adn 1 T. sour cream. Roll up.