Combine sugar, 1 teaspoon of the black pepper, soy suace and garlic. Stir well and add the beef. Stir well to coat beef and marinade for 20 minutes or longer. Combine remaining pepper with lime juice and water. Place in a small serving bowl. Saute beef in hot oil, three to four minutes until medium rare. Arrange on platter lined with lettuce and serve with lime sauce and toothpicks, or serve as a main dish over jasmine rice. Clay Irving