Ah... nothing like food from a Swedish furniture store... It's a little bit odd that Ikea offers food at all but I guess they're just spreading the culture. I don't think I've ever heard of or seen a Swedish restaurant around these parts.
Ikea offers a pretty broad selection of food in a cafeteria setting. For $4.99 (update 1/13/13: it's only $3.99 now!), I got 15 meatballs smothered in gravy, a scope of mashed potatoes, and a spoonful of lingonberry sauce. Lingonberry tastes a lot like cranberry to me. I've never really taken to eating cranberry with my turkey, so I didn't care much for lingonberry with my meatballs. I did enjoy the meatballs and the mashed potatoes however. The meatballs tended to be on the dry side but that's what the gravy is for. I like the gravy, it goes well with the meatballs and mashed potatoes.
Ikea also sells the gravy, meatballs (frozen in 3lb bags), and lingonberry jam for people who really like those items and want to take them home.