Bone-marrow baked potatoes with avocado

I dare say some readers might shudder at the thought of bone marrow: either because it’s so gloopy or because it’s so fattening, or just because it’s ‘offal’. Well, please, please, if that’s you, just give it a try. The bone marrow melts like butter (and who doesn’t like butter on a baked potato?) and the avocado turns it into a feast of rich, fresh deliciousness, a huge cut above the pedestrian baked potato with cheese. Sometimes you can get free marrow bones from the butcher because few p