Clean the vegetables. Grate the carrot on the coarse side of a grater, and grate half of the parsley root on the fine side. Finely chop the onion and celery stalk. Break the noodles into smaller pieces.

Put all the vegetables and noodles into the jar, season with salt and pepper, and add the soup seasoning. Avoid using bouillon-style seasoning mixes or similar products loaded with additives.

Store the jar in the fridge (and remember to take it with you!). When it's time for lunch at work, fill the jar to the top with boiling water. Close the lid, give it a gentle shake, and let it sit for 10 minutes before eating.