1 - 1/4 lbs. cubed steak1 Tablespoon cooking oil
2 1/2 cups water
2 Tablespoons brown sugar
1/3 cup chopped onion
2 envelopes mushroom gravy mix
2 Tablespoons vinegar
Quickly brown steaks in hot oil.
Flips steaks over and brown the other side.
Remove steak from skillet and place in bottom of crockpot.
Chop onion.
Combine gravy mix and brown sugar in medium mixing bowl.
Add water and vinegar to gravy mixture.
Add chopped onion and stir until well combined.
Pour mixture over steak in crockpot.
Cook on LOW setting for approximately 7-8 hrs.
Thicken gravy with cornstarch (mixed with water) prior to serving, if desired.

Note: This recipe can also be prepared in a skillet. Quickly brown steaks on both sides. Add onion and cook until onion is almost tender. Combine water, gravy mix, brown sugar and vinegar; pour over steaks in skillet.
Cover and simmer for 20 - 30 minutes or until desired doneness.
Thicken gravy with cornstarch (mixed with water) prior to serving, if desired.