Meats, particularly organ meats, are a great source of iron. If you don't like organ meats, any sort of red meat is high in iron, as are most mollusks. Egg yolks are another good source. In fact, Atkins is so naturally high in iron that most people should take an iron-free vitamin. Not the case for you, of course, as you have been shown to be anemic.

Here's an article from web MD :

It used to be called "iron-poor blood," but now we know it as anemia. Whatever you call it, one way to help treat it is to eat foods rich in iron (most doctors recommend taking a supplement, too).

To boost the amount of iron in your diet, try these foods:

Red meat
Egg yolks
Dark, leafy greens (spinach, collards)
Dried fruit (prunes, raisins)
Iron-enriched cereals and grains (check the labels)
Mollusks (oysters, clams, scallops)
Turkey or chicken giblets
Beans, lentils, chick peas and soybeans
Liver
Artichokes
And here's a tip: If you eat iron-rich foods along with foods that provide plenty of vitamin C, your body can better absorb the iron.