Grass-Fed Steak With Bone Marrow

I got my hands on some bone marrow from Whole Foods over the weekend. I remember eating it at restaurants with my dad when I was a kid (probably the most nutritious thing I ate as a kid) and loving it. But prior to last night I haven’t had it in over 15 years, which is pretty regrettable. Bone marrow has long been used in traditional cultures all over the world, and is highly revered for its nutrient density. Each 100 gram portion of it contains roughly 240 IU of vitamin A, 107 mg of phosphorous, trace amounts of minerals like thiamin, niacin and magnesium, as well as 4.5 mg of iron. Bone marrow is also rich in the essential fatty acids docosahexaenoic acid, or DHA, and eicosapentaenoic acid, or EPA. A new body of research maintains that the fat of bone marrow is alkylglycerols, which is also found in liver, breast milk and…