My inlaws are visiting me from Northern Virginia (Burke specifically). I made tamales the other night and my MIL has decided that she wants a lesson in how to make them. That is the easy part. The hard part is that there is no possibility of her making tamales if she has to make the masa herself, hence, I need to be able to direct her to a mercado where she can pick up a bag of masa preparada. I haven't lived in the area in 10 years, so although I'm still good at restaurants from when I travel there, I'm woefully bad at buying ingredients in DC.
In Northern California, I can't swing a dead cat without finding a great mercado, but I'd appreciate some assistance in finding one that sells masa preparada in the NoVa area. I got a suggestion on eGullet for a mercadito in Herndon, but no indication if it sold masa preparada.
Thanks in advance.