It is half past nine. The plates are pushed back, and in the middle of the table there is a foil tray with a third of a curry in it, a tub of rice that is still nearly full, two naan and a handful of chips going cold in the corner of the bag.

Everyone has a theory about what happens next, and a few of those theories are wrong in a way that matters. Here are six things people often say about leftover takeaway, each checked against what the Food Standards Agency actually advises.

"Curry tastes better the next day." True, mostly.

Sauces built on a slow-cooked base (most curries, stews, chilli, ragù) do tend to taste rounder after a night in the fridge. Plenty of cooks make a sauce the day before on purpose.

The exception is anything creamy. Sauces finished with cream, yoghurt or coconut can split if you reheat them fast. Heat them gently, stir often, and add a splash of water if they tighten. The FSA wants reheated meat steaming hot all the way through, so keep going until it is. Just get there slowly.

"Rice is fine as long as you get it really hot." False.

This is the one worth reading twice. The risk with rice is not decided in the microwave the next day. It is decided in the hour after cooking. Rice can carry bacteria that survive cooking, and if cooked rice sits around warm they multiply. Some of what they produce isn't destroyed by reheating, however hot you get it.

That is why the FSA's advice for rice is stricter than for anything else: chill it as quickly as possible, ideally within one hour; keep it in the fridge; eat it within 24 hours; and never reheat it more than once.

The awkward part with a takeaway is that the hour is already running when the bag arrives. So the practical move is to deal with the rice before you sit down, not after the film. Spoon what you will eat onto plates, put the lid back on the rest, and put it straight in the fridge. If you followed our advice on ordering for a group and rounded up the rice, this is where the spare goes. And if the tub has sat on the table all evening, the honest answer is the bin.

"Leftovers keep for a few days." Half true.

The FSA puts it at 48 hours: eat leftovers within two days, or freeze them if you don't think you will get to them in time. Rice, as above, is 24 hours. "A few days" is where fridges quietly go wrong, because nobody remembers whether the tub at the back is from Friday or Saturday. Masking tape with the day on it solves that.

It also assumes your fridge is cold enough. The FSA's range is 0 to 5°C, and the dial inside most fridges is a setting, not a reading. A cheap fridge thermometer tells you what you actually have.

"Let it cool down completely before it goes in the fridge." False.

It comes from a good place: nobody wants to warm up the milk. But the FSA's advice is to cool leftovers and get them into the fridge or freezer within one to two hours, not to leave them on the side until they are cold. Overnight on the hob is the classic mistake.

You can speed it up. Tip the curry out of its deep foil tray into a wider, shallower tub so the heat has somewhere to go, and leave the lid off for the first few minutes before you close it.

"You can reheat it as often as you like, as long as it's piping hot." False.

Reheat once. The FSA says it plainly for meat and for rice, and it is the right habit for everything else in the bag. So take out the portion you are going to eat and heat that, rather than warming the whole tray and putting the rest back.

Freezing works the same way: freeze as soon as you can rather than on day two, defrost in the fridge, eat within 24 hours of defrosting, and reheat once.

"Chips can be saved." Half true, at best.

Chips, pakora, bhajis, anything battered: these were at their best in the first few minutes, and nothing fully brings them back. The microwave makes it worse, steaming the crust soft from the inside. A hot oven, an air fryer or a dry frying pan gives you a fighting chance. Naan does better: a flick of water on each side and a few minutes in a hot pan or oven. Pizza goes in a dry pan with a lid on for a couple of minutes.

Leftover takeaway: what to do when the bag lands

If you only keep one part of this, keep the order of things:

  1. Before anyone sits down, plate the rice you will eat and put the rest in the fridge.

  2. When the meal is finished, move what is left into shallow tubs, write the day on them, and get them in the fridge within the hour or two.

  3. Next day, heat only the portion you are about to eat, until it is steaming hot all the way through.

The honest limit

None of this makes a takeaway as good the next day as it was at 7.30, a good curry excepted. And none of the rules above are ours. They come from the FSA, whose pages on chilling, freezing and defrosting food and its home food fact checker are worth ten minutes. If something smells or looks wrong, or you cannot remember when it went in the fridge, don't taste it to find out.

Where FoodCiti fits

FoodCiti can't do much about your fridge. What we can help with is the other end of the problem: ordering the right amount from local restaurants in the first place. Delivery is free on orders over £15, and it is tempting to pad a basket to get over the line. If you do, add something that keeps, like a second curry you will be glad of tomorrow, rather than another portion of chips that won't survive the night.

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