This popular snack is part of Singapore's diverse intangible cultural heritage. You may have spotted the flaky pastry at Malay food stalls around Singapore. Called Roti Boyan (Bawean), they are either shaped into round or square pastries and deep fried till golden brown. The modern version even looks a bit like a large curry puff. The filling is made of potatoes, onions, celery, spring onions, pepper, salt and egg mixed well together.