After all, bringing food in summer is to fight microbes. In order to make the box lunch safe, we must come up with a way to limit microorganisms without using a refrigerator.

First, blanch the cleaned lunch box with boiling water and sterilize it; Then put the rice just out of the pot, seal the lunch box immediately, and put it in the refrigerator as soon as the temperature drops to a level that is not hot. When it is taken out, the lid of the plastic lunch box will sag, so it is difficult to open the lid of other closed lunch boxes or glass jars, because the air in the box shrinks due to cold, resulting in negative pressure, which makes it difficult for bacteria to invade.

1. Make more sauerkraut, and acid can slow down the growth of bacteria.

2. When selecting materials, choose dishes suitable for multiple heating, such as potatoes, carrots, beans, eggplant, tomatoes, wax gourd, pumpkin, radish, mushrooms, kelp, fungus and so on. If you want to supplement green leafy vegetables, such as green peppers and spinach, you can blanch with boiling water in advance, and more than 70% of nitrate and nitrite can be removed.

3. Make less cold dishes to avoid the trouble of nitrite and bacteria. For example, if shredded Chinese cabbage and shredded radish are mixed for a long time at room temperature, the nitrite content will increase due to bacterial reproduction. If you must make a cold salad, consider adding more vinegar, ginger and garlic to inhibit bacteria.