Slow cooker beef

1/3 C flour
1 tsp salt
1/4 tsp pepper
2 1/2 lbs of beef (I used london broil cut into lg chunks)
1/4 C butter
2-3 sliced shallots (or 1 chopped onion)
1 minced garlic clove
1 C beef broth/stock
3/4 C red wine vinegar
3/4 C brown sugar
1/4 C tabasco sauce (or chili sauce)
2 tbsp ketchup
2 tbsp Worcestershire sauce
1 tsp chili powder

1. Put flour, salt and pepper in ziplock bag
2. Add beef and shake to coat
3. Brown beef in butter in lg skillet
4. Place browned beef in slow cooker
5. In same skillet, combine remaining ingredients
6. Bring to a boil, stirring occasionally
7. Pour over beef in slow cooker
8. Cover and cook on low for 9 hours or on high for 4-5 hours.