It's not so difficult. When you cook a big soup for dinner, you can pack the left overs in a container and take it to work the next day. The ingredients absorb the soup stock with time to enhance the taste.
Ingredients;
-meat balls*-
minced pork
onion
nutmeg
salt
pepper
egg
bread crumb
-soup-
potato*
carrot*
cabbage*
boiled tomato can
paprika powder
consomme soup
rose marry
broccoli*
*Anything you like
1- (meat balls)Mix the minced pork with finely cut onion, salt, pepper, egg(1/2), nutmeg and bread crumb. Then make small balls. Fry 1 and keep it away.
2- (soup)Stir-fry the potato and carrot in the same pan and put the cabbage and 1 in. Add the boiled tomato, consomme soup, paprika powder and rosemary, then close the lid on and boil for 30 minutes.
3- Adjust the taste with salt and pepper.
4- Put the boiled broccoli on top of the soup.
You can add some colorful vegetables like broccoli on the top to make it look nicer.
I am using this practical container that hardly leaks any water but soup lunch is getting popular so you can easily find better ones that are cute or stylish in Japan.
Itadakimasu.