The above results were visualized with scanning electron microscopy. The above-mentioned results, concerning the structure of food products, can lead to the production of foods with fixed structure of specific porosity and pore size distribution. Information about the structure collapse of foods is very useful for the process design and the production of high-value foods with desirable properties. Depending on structural properties, the best quality products were those, which presented the smallest shrinkage (high porosity), namely those freeze-dried at the lowest chamber pressure.