Cold Noodles with Sesame Sauce in Dallas
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Might try any of the Sichuan places....they have a spicy cold noodle
Royal Sichuan in Richardson
Sichuanese Cuisine in Plano
Little Sichuan in Plano
I would also call Hong Kong Royal in Carrollton as they might be receptive to preparing the dish for you.
Sichuanese Cuisine Restaurant
2001 Coit Rd, Plano, TX 75075
Hong Kong Royal Restaurant
3030 N Josey Ln Ste 130, Carrollton, TX 75007
I know of two places serving "Dan Dan Noodles" (cold szechuan noodles) in Dallas not previously mentioned above.
1. Tongs House. The very first restaurant in Dallas to serve this cold noodle dish. Over 40 years ago!
2. Mr. Wok Asian Bistro