I have a fairly deep, microwavable, plastic dish with a lid. I put a cup of rice (usually Basmati) into it with two cups of water. I add a pinch of salt and let the rice soak for a few minutes.
I then place the microwavable dish in a microwave oven and weight the lid of the dish down with a inverted plate. I then microwave, at full power, for 12 minutes.

The rice grains are slightly stuck together and I could probably improve on this by rinsing the rice a few times - but I usually can't be bothered - it tastes OK, after all!