In the process of looking for a pressure cooker (after hearing how miraculous a kitchen tool it is supposed to be), I have just downloaded the User Manual from the Kuhn Rikon Duromatic website. On page 56 it says:
10. This cooker is not suitable for the preparation of apple compote, cranberries, porridge (oat flakes), barley or other cereals (except those listed on page 73), peas, pasta, macaroni or rhubarb. These foods tend to foam and froth and could block the valve. These foods should not be cooked in a pressure cooker. <-- <--
But unless my memory is failing me at this age, I am quite sure there exist recipes for pressure-cooked 1) oatmeal, 2) barley, and 3) pasta, from both online sources as well as books such as the much-vaunted Modernist Cuisine series.
So what gives, given this apparent blatant violation of the usage guidelines? What's going on; I would like to know to be able to make an informed purchase.