The best liver is calf’s liver, sweet and meltingly tender. Lamb’s liver is also sweet but firmer when cooked.
Liver is generally sold ready prepared. If not, run your fingers over the surface to check for any tubes and remove. When buying lamb’s and calf s liver I look for the palest colour as experience has taught me it is milder and more tender. As well as being shallow fried, calf’s and lamb’s livers are excellent stir-fried.