As seen in the December 2009 Food and Wine.

The eastern coast of Sicily is home to some of the Mediterranean's most fertile lands - the warm summers and cool winters make this land ideal for citrus growing and that's precisely what the Marchesi Castello di San Giuliano and his family have been doing for 800 years.

In the late 1980's, the family noticed that some of the fertilizers that had become commonplace were producing a fruit that lacked the color and flavor to which they'd become accustomed - and so they returned to organic farming methods. Now all of their fruit is grown this way once again and the quality of their jams is unmistakable.

Available in Red Grapefruit, Blood Orange and Tangeli (a hybrid of mandarin orange and yellow grapefruit), these three flavors represent the bounty and uniqueness of Sicilian citrus. The best and simplest way to enjoy them is on toast with a smear of sweet butter. The richness of butter and the bittersweet tang of marmalade is a tried and true combination.