To cut food material, in particular potatoes and sweet potatoes, into continuous close-loop shapes, a cutting blade assembly is used. The cutting blade assembly consists of an outer and at least one inner concentrically arranged cutting blade, where each cutting blade has a close-loop cross-sectional shape. The space between adjacent cutting blades forms a cutting tube. The cutting tubes ultimately form the cross-sectional shapes of the cut food material. Supports, such as blade guides and plungers are slidably positioned between the cutting blades in the cutting tubes. These supports maintain the distance between adjacent cutting blades and assist in separating cut food material from the cutting blades. This cutting blade assembly may be used in a method and system for cutting food material into continuous close-loop shapes.
