3 to 4 lbs. sirloin tip roast
1/2 c. soy sauce
1/4 c. vinegar
1/4 c. water
2 tbsp. honey
1/2 tsp. garlic powder

Mix ingredients in dish. Place roast in marinate and set in refrigerator for 24 hours. Bake at 300 degrees for 2 hours for medium-well done.