Ginger & Onion in Market Village has carts. Cheaper than Dragon Dynasty, quality is ok, different clientele - more grassroots type of folks.
Very Fair Seafood Restaurant in Milliken Square (Milliken & Finch). Again very cheap, ok dim sum, you get what you pay for. I prefer this over Dragon Dynasty as I do not like how DD differentiates between regulars and the rest of us (regulars wait in a separate line). For me, the difference in quality does not justify the premium in price and the poor service I experience at DD.
if your client does not speak Chinese, these places may be more of a challenge but maybe also more adventurous.

Oriental gourmet at 633 silver star blvd is pretty good. Small restaurant but very busy.
I think the noodles are just egg noodles. Chinese name of dish is " two-face-yellow".
Restaurants in HK use pearl leaves in the chicken dish. Sometimes they substitute with spinach.