Brian G.
Yelp
Mitsitam is easily the best of the Smithsonian Cafes (just slightly ahead of the offerings at the National Museum of African American History and Culture).
There are five stations, each representing a different region: Mesoamerica, Northern Woodlands, South America, Northwest Coast and Great Plains. The menu rotates seasonally, though there are some items that are always available, including the green chile bison burger and the Indian tacos (vegetarian and meat-based options for the chili exist). The rotating foods offer a decent value - most entrees come with 2 sides (and you can mix/match sides from different stations). I've been eating here for years, and some of the more memorable items have been the bison & duck burger, the tamal, and the braised pork shanks. My friends have enjoyed the cedar-planked salmon, and I always grab anything with nopal in it if available! Vegetarian options are usually plentiful, especially in terms of sides.
Prices are a little bit higher than other Smithsonian cafes, but you will actually want to eat the food here. Virtually every other Smithsonian (save for the aforementioned NMAAHC) has cafes that serve mediocre food at best (sending serious side eye to Air & Space and American History). Here, you'll get something interesting and tasty, all served in a beautiful venue -- okay, it's still a cafeteria, but this one is a bit nicer.
Signage could be *way* better - people tend to cluster at the entrance where they pick up their trays and don't realize that there are several stations. The folks working the checkout are really friendly, but the line situation can get intense during peak hours, especially if there are a lot of schoolchildren visiting. Mitsitam is technically open until 5pm, but in the off-season, it often closes by 3pm. Plan accordingly.
There is an espresso bar available out front if you just want a quick drink, but in my experience, it's better to skip this - the drinks are often not very good and are a bit pricey given their quality. Just head into the cafeteria for something better or go visit a nearby coffee shop if you must have a hot drink.
I would love a sit-down version of Mitsitam because cafeterias are inherently limited in what they can do food-wise. Avoid peak lunch hours because of the noise, lines, and lack of seating and you'll do just fine.