1 1/2 lbs. beef roast
1 lg. onion
1 tsp. oregano
2 bay leaves
1 tsp. garlic powder
Salt/pepper to taste
1/4 c. olive oil
1/4 c. wine vinegar
1/4 c. beef broth
1 tsp. oregano
1 sliced onion
Avocado slices
Lettuce garnish
3 c. water