1. Processing method: frozen food is frozen to extend its shelf life, while prefabricated food is cooked and mixed after the preliminary processing of ingredients, and then packaged into convenient dishes.
2. Storage method: Frozen products usually need to be stored at low temperature, generally below-18℃, to ensure that food does not deteriorate during storage. However, prefabricated vegetables usually need to be stored at refrigeration temperature, usually between 0-4℃.
3. Usage requirements: Frozen products usually need to be thawed before use, and their frozen state will change the texture and taste of food. However, prefabricated dishes are generally cooked, and they can be eaten only by heating or cooking for a while.
4. Food quality: Frozen products can better retain the nutritional value and taste of the original ingredients, because freezing can slow down the activities of cells and enzymes. In the process of cooking and mixing, prefabricated vegetables may lose some nutritional value.
5. Food diversity: Frozen products are usually frozen with a single ingredient or product, such as frozen meat and frozen jiaozi. However, prefabricated dishes are usually cooked by combining a variety of ingredients to form a dish, such as cooked food and fried rice.
To sum up, frozen products are mainly used to prolong the shelf life of food and facilitate storage, while prefabricated vegetables are mainly used to facilitate eating and reduce cooking time. These two food processing methods have their own characteristics and uses, and they are chosen according to personal needs and preferences.