I just found out that my favorite Mexican restaurant in Denver, Tamales by La Casita, has a branch at DIA. It's in Terminal C in the central food court.
I am a tamale nut, so when presented with a restaurant that features tamales, there is no question what I will order. My pork tamales were excellent. The filling had that wonderful combination of tamale tastes and spices. The masa's slight sweetness complements the pork perfectly. I ordered mine Christmas style: one red and one green. I must say that the red sauce was my favorite. It had just the right amount of burn going down, enough to be pleasant but not too strong. I really enjoyed my lunch.