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From: Guy (
Subject: Re: Cooking lentils and split peas in Kuhn-Rikon....
Date: February 9, 2005 at 11:24 pm PST

In Reply to: Cooking lentils and split peas in Kuhn-Rikon.... posted by Shelly on February 9, 2005 at 12:17 pm:

If you purge your pc of oxygen right after you close the lid of your Kuhn Rikon (or any other PC) you will greatly reduce or eliminate foaming problems. This is accomplished on a Kuhn by holding the valve down for a couple of minutes after sealing the lid. See the link below to see how the Kuhn site describes how to release pressure by holding the valve down in an open position. This same procedure at start up purges oxygen and solves foaming problems with zero oil or kombu.

Since reading about this technique quite a few years ago I have not had a single clogged valve and the resulting mess all over the stove. Even though I previously used 2 or 3 teaspoons of oil to reduce foam my pc's more often than not foamed and clogged the valves.

Also, I cook foods that are notorious for causing foam problems such as rice, beans, lentils, split peas and oats. Oats seem to be about the worst offender when purging is not performed after closing the lid. They're no problem if this procedure is done.

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