Caviar's role as the premier delicacy of kings, emperors, and other heads of state stretches all the way back to the Persian Empire and the "Cake of Power" days of the delectable Sturgeon Roe. It's hard to come by, even harder to pay for, and what many people might not realize, hard to prepare
persian caviar and serve.
The most important thing to remember is that when you buy caviar, you have a limited window to use it. Fresh caviar is good for at most four weeks. Though, if you decide to purchase pasteurized product, you'll be safe for a while longer. After opening though, you'll want to use your caviar as quickly as possible, within a couple days at most.