U.S. private equity firm Riverside Co has made an undisclosed investment in Nustef Foods Ltd, a Mississauga, Ontario-based manufacturer of Italian-inspired pizelle waffle cookies and artisan crackers under the Reko brand. Founded in 1985 by President and CEO Ces Nucci, NuStef has built a customer base in the grocery, mass, club and foodservice channels across the United States and Canada. Riverside Partner Meranee Phing said the firm will focus on expanding Nustef through investments in distribution, product innovation and marketing. This activity will be supported by Riverside Senior Food and Beverage Advisor Richard Lan.