Wipe ham with a damp cloth. Put in a large kettle, add carrot, onion and bay leaf; cover with water. Bring to a boil and simmer until tender. Let ham cool in water it was cooked in. Remove ham rind and score the fat with criss-crosses.
Spread with mustard and stick cloves in score marks. Mix together the sugar and crumbs with a little vinegar - press this in a thick layer all over the ham. Bake slowly to brown.Servings: 6 to 8