Beef Gyros

INGREDIENTS:
1 medium onion, cut into chunks
2 garlic cloves
2 tablespoons sugar
1 tablespoon ground mustard
1/2 teaspoon ground ginger
1 1/2 teaspoons pepper
1/2 teaspoon cayenne pepper
1/2 cup soy sauce
1/4 cup water
2 pounds beef sirloin tip roast, cut into 1/4 inch thick slices

CUCUMBER SAUCE:
1 medium cucumber, peeled, seeded and cut into chunks
4 garlic cloves
1/2 teaspoon salt
1/3 cup cider vinegar
1/3 cup olive or vegetable oil
2 cups sour cream
8 pita breads, warmed and halved
thinly sliced onion
Chopped tomato

DIRECTIONS:

1. In a blender or food processor, place the onion, garlic, sugar, mustard, ginger, pepper and cayenne; cover and process until onion is finely chopped. Add soy sauce and water; process until blended. Place the beef in a large resealable plastic bag. Add marinade. Seal bag and turn to coat; refrigerate for 1-2 hours.2. For sauce, combine the cucumber, garlic and salt in a blender or food processor; cover and process until cucumber is chopped. Add vinegar and oil; process until blended. Transfer to a boil; stir in sour cream. Refrigerate until serving.3. Drain and discard marinade. Cook beef, covered, over medium-hot heat until meat reaches desired doneness. Place beef in pita halves. Top with cucumber sauce, sliced onion and chopped tomato. Refrigerate any remaining sauce. We also cut up another cucumber to accompany the Gyros.

I found this recipe here at All Recipes.com