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Passover is famously the holiday when Jews ask four questions at the ceremonial meal, most notably, "Why is this night different from all other nights?"This year, there's a new answer: For the first time, the Orthodox Union, the ultimate authority on kosher foods, has put its "kosher for Passover" symbol on certain brands of quinoa.
Can other trendy ancient grains -- like buckwheat, sorghum and millet -- be far behind?
To find out, we asked a rabbi. Or two.
First, let's review the Passover rules. Five kinds of grains are prohibited: wheat, rye, barley, oats and spelt. Why? Because these grains begin to ferment and rise when they come into contact with water for 18 minutes.
More: Quinoa Is Kosher for Passover, but Mom May Not Approve : The Salt : NPR