Wind Point Partners has agreed to sell Nonni's Food Company Inc. to Greek food group Vivartia, which is owned by Marfin Investment Group. The deal is valued at around $320 million, and is expected to close by April 1. Nonni makes branded food products like biscotti, bagel chips and pita chips. It recorded 2007 sales of $187 million, and $32 million in EBITDA. www.nonnisfoods.com