That comes from a book on Italian cookery that I have. (It's from a recipe for polenta which is made with cornmeal)

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Note added at 19 mins (2007-06-01 18:50:33 GMT)
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"Pap, a traditional porridge made from mielie-meal (ground maize or other grain), is a staple food of the Bantu inhabitants of South Africa (the Dutch word "pap" simply means "porridge" or "gruel"). Many traditional South African dishes include pap, such as smooth maize meal porridge (also called slap pap), and crumbly "phutu" (pronounced "poo-too") pap. Such dishes are enjoyed primarily by the indigenous black population and the Afrikaner population, rather than those of English or Asian descent.

A variety of savouries are used to accompany pap, made from green vegetables, and flavoured with chilli. Since mielie-meal is inexpensive, poor people can afford to combine it with vegetables and be sure of one good meal a day. It can be served hot or, after it has cooled, it can be fried, giving it a different texture. Phutu porridge is sometimes enjoyed with chakalaka as a side dish with braais. Pap is also called ugali in eastern and southern Africa; sadza in Zimbabwe; and banku in West Africa. In Nigeria, it is called "Akamu" amongst the Igbos and "ogi" amongst the Yorubas with a consistency similar to American pudding. Ogi/Akamu in Nigeria is generally accompanied with "moin-moin", a tasty bean cake. A similar dish is polenta, from northern Italy. "
( From: http://tinyurl.com/2uaqm8 }

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Note added at 25 mins (2007-06-01 18:55:48 GMT)
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So, you could also try"

'cooked to a pap'.

However, personally, I would be careful about using the term 'pap' as it also has negative connotations:

"pap1

• noun 1 bland soft or semi-liquid food suitable for babies or invalids. 2 (in Africa and the Caribbean) maize porridge. 3 worthless or trivial reading matter or entertainment.

— ORIGIN probably from Latin pappare ‘eat’ "
(From: http://tinyurl.com/2vrgj3 )

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Note added at 29 mins (2007-06-01 19:00:29 GMT)
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Or, you could also try:

'cooked to a thick, porridge-like consistency'

http://tinyurl.com/2pc4h6 (examples in context)