Greek Christmas or Easter Bread
In Greece and Turkey, this bread is called Christopsomo or tsoureki (also known as lambpropsomo during Easter). It differs from stollen in that it’s proofed before baking, but the proofing time is shorter than for panettone. Mastic gum, also called mastica, is an aromatic gum resin derived from the bark of a Mediterranean shrub tree in the pistachio family. It can be found at stores that specialize in Greek and Middle Eastern ingredients. It adds a subtle and......breath-freshening flavor and aroma (no surprise, it has long been used as a natural breath freshener).