Dian Xiao Er has my favourite duck rice. Roasted duck with a thin layer of fat beneath the skin, drowned in delicious tangkwei herbal sauce. Althought they use less meaty ducks nowadays, it's still all good when paired with crunchy cucumbers.
They drizzle the delicious sauce on the rice as well.
You get an additional double boiled soup of the day for a 1 person set meal for $6.90, that's almost the same price as the hawker center.