I am looking for ways to best preserve garden fuits, vegetables, and forest truffles. After several research, I found that ideally, such food are best preserved using freeze drying methods. Something out of reach to most home users. The second best options is flash freezing with liquid nitrogen to keep water crystals smalls. Liquid nitrogen is pretty expensive in my country but this gave me several idea. One way to speed up freezing is using liquid conduction(much faster then air conduction or convection) by vacuum sealing food in plastic bags and immersing then in glycol bath kept in the home freezer. Now, I can have access to lab freezer that reach -45C and even -80C that allow glycol at very low temp and will speed things faster. What do you guys think? Will I get similar performance to Liquid nitrogen? Samer.