Why is cooking rice so complicated?

Once you get the hang of it, rice is as easy as pasta. One thing you say in the question that may be central to the difficulty you are having is that your lid is "half-closed". For the majority of rice cooking methods, not only should you keep the lid tightly closed, but you shouldn't even open it to check the rice until it has cooked close to long enough that it might be done. Look at the accepted answer here: Rice gets burnt and watery. That answer explains it more thoroughly.

You can cook rice like pasta, boiling in excess water until done then draining. But there are a couple main reasons not to:

• You'll wash away a lot of the starch. Especially for starchier varieties (short and medium grain), this may not be a good thing - you'll end up with distinct grains, not nice fluffy, slightly sticky rice.
• It can be a pain to drain properly. You probably have a colander for pasta, with holes large enough that rice will fall through. If you use a metal sieve, it can be prone to getting little bits stuck in it, making it hard to clean.
• If you accidentally overcook it, it'll be awful, soft and mushy. If on the other hand you start with the right amount of water, and overcook it, it'll just stick to the pot on the bottom, leaving most of it still good on top.

So if you're having trouble with traditional methods, you can try boiling, or try a pilaf (something like this, but you can make it plain if you want), which will be less prone to sticking and overcooking. Or else you can just get a rice cooker and get it right every time!

But it's really not that bad, and I'm sure you'll figure it out after a few tries. Measuring the ratio correctly is easy enough (though you may want to adjust it if you find it's consistently not quite to your tastes), and beyond that you just have to be careful not to let it cook too hot and stick.

Also, for your specific experience, the half closed lid might have the problem. That will let a lot of steam escape, so you won't have enough water left to cook it properly. And adding more at the end is never as good as having it right to begin with, since it takes time for the new water to come up to temperature, and the rice has time to get soggy on the outside without cooking thoroughly. The method I've always known is to simmer with a closed lid - just make sure you turn it down as soon as it's hot enough so it doesn't boil over or stick.

For convenience and foolproofness, it's hard to beat a rice cooker. These inexpensive appliances cook the rice only until the free water has boiled away (measured by when the temperature of the pot starts to rise above boiling temperature of water) and the temperature begins to rise, then drop back to a keep-warm setting.

But in fact, I've had perfectly adequate success by following exactly the directions on the package. Usually a 2:1 water-to-rice ratio. Boil water, reduce to low simmer, add rice, cover, ignore for exactly 20 minutes (do use a timer!), remove from heat. The only tricky part is figuring out how low to set the simmer so it doesn't foam/boil over... though that's only messy, not a problem for the rice. Any venting should be minimal -- the rice steams as much as it boils, so you don't want to lose much moisture.

I actually like very slightly burnt rice, but have found no way to get that to happen reliably to exactly the right degree.

You can cook basmati rice easily in the microwave. Just add almost double the amount of water and cook on high power for between about 6 minutes (1 portion) to about 15 minutes (lots of rice). Remember to use a lid/pierced cling film, and a fairly large bowl, because the water tends to bubble up and make a mess otherwise.

Edit: The rice will be hot for a few minutes, so water will evaporate. Hence you don't want it to be dry when you take it out of the microwave, as it will get even drier. Best to take it out when still slightly wet and fluff it up with a spoon/fork/utensil of your choice. If there's still some water left after a couple of minutes, pop it back in for slightly more. If it is cooked but dry, add some water, stir and pop it in for a minute or so.

Edit 2: Since I started cooking, I've always used basmati rice. Recently I tried brown rice for the first time, and let me tell you microwave cooking doesn't work well for it. Another thing - I wouldn't advise making lots of basmati rice and reheating the leftovers over the course of a week, but if you do, it's better to reheat individual portions in the microwave rather than the whole thing.

This pagefor example explains all great and with images:

Basmati cooking

Trick is to use a rice:water ratio of 1:2, so for every cup of rice you add two cups of water. And to keep the lid closed at as soon as the water boils.

For most meals you want to have the rice a little sticky so it doesn't fall off the fork or chop sticks.

As for the why question it seems rice takes longer to cook and is losing more starch than pasta, so you can't just cook it in 5 liters of water.

Get a pressure cooker(works for any kind of cooking) or an electric rice cooker.

All you have to do is - put rice, add equal or little more water, salt to taste and your rice is ready in 15 minutes. Millions of people in India use that for generations!

The reason why it's different is because pasta is boiled in hot water. It cooks from being immersed in the hot liquid, some of which might be absorbed into the noodles, and the excess is discarded. The purpose of that water is primarily as a medium to transfer uniform amounts of wet heat to the noodles.

Cooking rice is not done by boiling the rice in water. This is where you got off track. The specific amounts of rice and water and cooking times are for allowing the rice to be cooked by steaming. Furthermore, the rice grains are supposed to absorb all the liquid, and we stop right at the point where it's all absorbed, but the lack of remaining liquid doesn't cause the rice to burn or scorch.

If there's too much water at the start, then the rice keeps absorbing additional liquid, and it becomes a mushy porridge, so having more water then pouring it off, like with noodles, falls short in that area, as well, if for some reason the timing is disrupted or off.

The fact that you had the lid half off, instead of completely covering the rice, is why you needed to add additional water at the end. While some recipes or methods (especially for brown rice) might have you boiling off excess water at the beginning, the bulk of the cooking and the final stages are usually with the cover on.

Obviously, there are exceptions for particular dishes, but, ultimately, the most used method for preparing plain rice is steaming.