(computing, rare) Computer program code characterized by several well-defined and separable layers forming a hierarchy of subsystems.
After spaghetti code, and the layered construction of lasagna; coined by Joe Celko in 1982.
lasagna code - Computer Definition
Program code that is written in layers, each layer an independent module (subsystem) that interacts with the next layer (lasagna is made with layers of dough). The network protocol layers are an example of lasagna code (see OSI model). See spaghetti code and ravioli code.