Don't look for stall offering Chinese Desserts. Be very specific key in Tong Sui and Google would undertsand what you are looking for. There are quite a few in this Chinamen neighbourhood.
This Tong Shui place Ruby restaurant, sings their own praises, which is evident through the name of the shop In Chinese, meaning “The king of Black Sesame Paste”. The shop was gaudily decorated with banners and poster i Chinese writing

 It’s true that Ruby Restaurant is really confident in their store’s offerings, but they’re not exaggerating at all: It is now a fourth-generation business which has been lingering in the KL desserts scene for more than 100 years! The aptly named Ruby Restaurant surely lived up to its name, whipping up a lovely rendition of Chinese desserts.

Pix # 1 Chen Chen Roast Duck & Goose Restaurant

Chen Chen Roast Duck & Goose Restaurant

Pix # 2  Chen Chen Roast Duck & Goose Restaurant

Chen Chen Roast Duck & Goose Restaurant

Pix # 3 Chen Chen Roast Duck & Goose Restaurant

Chen Chen Roast Duck & Goose Restaurant

Pix # 4 Chen Chen Roast Duck & Goose Restaurant

Chen Chen Roast Duck & Goose Restaurant

Pix # 5 Chen Chen Roast Duck & Goose Restaurant

Chen Chen Roast Duck & Goose Restaurant

I would get a plastic container of dessert at Rgt2.80 in PJ. Ruby take away would be in a flatted container holding half the amount and priced @ Rgt 5.00. I would consider that pricing stiff