Have you tried this Knacha Posto Bata: Poppy Seeds Paste? “Posto, is so often used in Bengali cuisine . A lot many Bengalis are fervent posto eaters: to the extent that posto is served in some form or the other in a meal every single day. It could be side dish, or used to thicken a sauce, or to stuff a vegetable, and also made into fritters. Besides using it as a garnish, the Knacha Posto Bata (raw poppy seeds paste) is a dish in its simplest form.I am trying this first time with my Bengali aunt