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