In a large skillet, cook the beef, onion and green pepper over medium heat until no longer pink; drain. Add the Worcestershire sauce, soy sauce, garlic powder, cumin and Italian seasoning; mix well. Bring to a boil. Reduce heat; simmer for 5-10 minutes.
In a small saucepan, bring sauce ingredients to a boil. Reduce heat; simmer for 5-10 minutes. Spoon meat mixture into pita halves; top with sauce, tomatoes and lettuce. Makes 6 servings