How to Put Together a Lunchbox: Pack Tomorrow's Lunch in 15 Minutes the Night Before with "One Main, Two Sides"

This scenario is adapted from common everyday situations, and the name used is a pseudonym. The content is only a reference for organizing your routine, so please adjust it to fit your own situation.

10 p.m. for Wei: opening the fridge with no idea what to bring for lunch tomorrow

Wei works in administration at a trading company. Her lunch break is only one hour, and the restaurants near the office often have lines at noon. At the start of the month she decided to begin bringing her own lunch, for a simple reason. She didn't want to spend her break waiting in line and hunting for a seat, and she wanted to save a little time to read at her desk or go out for a walk.

For the first two weeks, Wei only brought lunch on and off. A typical scene went like this. At 10 p.m., after her shower, she would open the fridge and see half a box of braised dried tofu, two eggs, a handful of greens, and half a bowl of rice left over from the day before. She would stand there thinking for five minutes, then close the door and decide to just buy lunch outside the next day. The next day, waiting in line at noon, she would feel again that she should be more organized.

Later, Wei changed her approach. Instead of figuring out from scratch every night what to eat the next day, she first divided up the sections of her lunchbox, so each section only answered one simple question. With this approach she went from bringing lunch once in a while to bringing it three to four days a week, and the time she spent packing at night settled at around 15 minutes.

Why is bringing lunch so hard to keep up? What usually gets in the way is "deciding"

Many people think they can't keep up with bringing lunch because they can't cook or don't have time. In reality, the cooking part often isn't hard. The hard part is having to make decisions from zero every night: what main dish, what sides, whether to add one more thing, whether it will all fit, whether the sauce will leak everywhere. With too many decisions, it's easy to give up in front of the fridge.

The second sticking point is not having a set time. If packing lunch isn't part of a fixed slot in your evening, it ends up competing with laundry, replying to messages, and watching shows. It usually lands last and gets skipped the most.

The third sticking point is packing the box. The food is cooked, but then the box won't fit everything, the side dishes get soggy from the sauce, and the next day you open it to a mess, so you want to bring lunch even less next time. None of these three things have to do with cooking skills. They have to do with process, so they can be handled with fixed steps.

How to put together a lunchbox: set the sections first with "one main, two sides"

"One main, two sides" means your lunchbox always holds one section of rice, one main dish, and two side dishes. You don't have to rethink what the lunchbox looks like every night. You just pick one item to fill each section.

Step 1: Choose a lunchbox with dividers

A lunchbox with dividers keeps each section separate, so sauce is less likely to run into the other sections. If the lunchbox you have doesn't have dividers, you can use small silicone divider cups instead. Once you've chosen a box, stick with the same one, so you don't have to re-estimate the space every time you pack.

Step 2: The main dish section, pick one thing already in your fridge

The main dish section holds one dish that plays the lead role, such as braised chicken leg, pan-fried fish fillet, stir-fried pork strips with dried tofu, tomato and egg stir-fry, or teriyaki tofu. The rule for choosing a main dish is "what's in the fridge right now," not "what do I feel like eating today." When you pick from what you already have, you don't need to make an extra trip to the supermarket at night just for your lunchbox.

Step 3: Two side dish sections, one for vegetables and one for anything

The first side dish section always holds a vegetable, such as blanched sweet potato leaves, stir-fried cabbage, or cucumber salad. The second side dish section is up to you. It can be a braised egg, baby corn, stir-fried mushrooms, or a small portion of something left over from the day before. Once one section's category is fixed, you have half as many things to pick at night.

Step 4: The rice section, cook it all on Sunday and portion it out

You can cook rice all at once on Sunday, divide it into small containers, and freeze them. On weekday nights when you pack your lunch, take one container out of the freezer and put it in the rice section. That way the rice section never needs extra work during the week.

Step 5: Packing order and finishing up

• Put in the rice first, then the main dish, and the side dishes last. Put saucier dishes in the section with dividers.
• Let freshly cooked food cool before putting the lid on, so less condensation builds up inside the box.
• For dishes with a lot of liquid, use a spoon to drain off some of the sauce before packing.
• Once packed, put it on the same shelf in the fridge every time, and grab it from that same spot before you leave the next day.

The benefit of splitting things into "one main, two sides" is that you no longer have to think about what goes in each section every night. With the sections set in advance, all that's left is picking things from the fridge to fill them.

A sample weekly rotation: plan main dishes by day so you don't have to rethink at night

If you don't even want to pick a main dish every day, you can arrange main dishes into a fixed rotation by day of the week. Below is a sample, and you can swap in dishes you usually make.

Friday is deliberately left as an eating-out day because last-minute lunch invitations often come up before the weekend. It also gives you a chance to clear out the fridge before the weekend, and then you prep again on Sunday.

Common sticking points: what if you have no time, forget your lunch, or find it a hassle?

You can't find time at night

If you really can't spare 15 minutes at night, you can move the prep to Sunday. Spend some time on Sunday braising a pot of something, blanching a batch of greens, and cooking and portioning rice, and on weekday nights all that's left is packing the box. Packing doesn't require turning on the stove and only takes a few minutes.

You packed it but forgot to bring it

Many people pack their lunch only to leave it in the fridge the next morning. Wei's trick is to hang the empty lunch bag on the front door handle the night before. When she touches the bag on her way out in the morning, she remembers the lunch in the fridge. You can also set a reminder on your phone for right before you leave.

Washing the lunchbox feels like a hassle

If you wait until evening to wash your lunchbox, the dried sauce is harder to clean. After eating at the office, you can give it a quick rinse with water first, then wash it properly at home. Having two identical lunchboxes to alternate also means you won't be stuck with a box that's still wet when it's time to pack at night.

Too many dish options make it harder to choose

If having too many dish options makes you hesitate, start by keeping track of just five main dishes and five side dishes. Write them on a note and stick it on the fridge door. At night, look at the note before opening the fridge and pick from the list, leaving out anything that isn't on it for now. Once you're used to the list, slowly swap in new dishes. It's also fine if you skip a few days along the way. Just start again with the rotation the next Monday.

Next step: start by bringing lunch two days next week

If you also want to start bringing lunch, you don't need to bring it every day right away. Pick two days next week, pack your lunch the night before using "one main, two sides," see whether the routine works for you, and then gradually add more days.

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FAQ

Q: If I don't have a lunchbox with dividers, can I use a regular food storage container?
Yes. A regular food storage container with small silicone divider cups can create separate spots for the main dish and side dishes. The key is to use the same container every time, which makes it easier to estimate the space when packing.

Q: How should I heat up a lunch I packed the night before?
It depends on what equipment your office has. If you use a microwave, first make sure your lunchbox is microwave safe, and open the lid or lift one corner while heating. If your office has no way to heat food, you can choose more dishes like cold salads and braised foods that taste good without heating.

Q: I cook for one, and I often can't use up my ingredients. What should I do?
You can spread the same ingredient across different sections on different days. For example, with one head of cabbage, stir-fry some as a side dish on Tuesday, and on Thursday shred some and toss it into the stir-fried pork strips with dried tofu. When planning your rotation, check what's in the fridge first, then decide on that week's dishes.

Q: If I only want to bring lunch one or two days a week, does this method still work?
Yes. "One main, two sides" is meant to cut down on decisions at night, so you can use it no matter how many days you bring lunch. Start with two days a week and add more once it feels comfortable, so you're less likely to feel pressured from the start.