Ah Yat Abalone Forum
As the name implies, this old-school Chinese restaurant in Sudirman specializes in abalone, offering species of the pricey marine mollusc from all over the world. But their Sunday dim sum is also one of the best in the area (and one of the few that still has trolleys going around offering instant glutinous gratification). Their dim sum standards are fine but be sure to supplement them with one or two of the deeply-flavorful sapo (claypot dishes) from their regular menu. Arrive before noon if you want to avoid long lines caused by the after-church rush.