Beef Fat

It usually has higher concentrations of some nutrients: antioxidants, some vitamins, a kind of fat called conjugated linoleic acid (CLA) and the long-chain omega-3 fats mostly found in fish. It also has less fat overall. ... Omega-3 levels in grass-fed beef generally are about 50 percent higher than in regular beef.

Render as you would lard. Cut up and cook in a pot, then strain through a colander lined with paper towels. Place in clean jars and put lid on.