(also paindemeine, payndmayn, paynedemayne, peyndemayne, payndemayn, paindemain, pandemain, payman, paymen, paynemayn, paynmain, paynman, paynmayn, paynmayne, paynemayne. OED) )
Old term for very fine white bread. Chaucer's 'Canterbury Tales' of c1390 has; "White was his face as payndemayn."
Austin's 'Two 15th Century Cookbooks' (Austin 1440) has a very early reference to toast; "take Paynemayn, an kytte it an toste it".