The absorption method, with the ratios written down so you never have to look them up again. Rinse it, boil it, then leave it completely alone — the last five minutes off the heat with the lid on is the bit everyone skips.
why it works
Basmati has a naturally lower glycemic index than short grain, and long grains that stay separate rather than clumping. Cooking by absorption rather than boiling and draining means none of the B vitamins go down the sink with the water.
Rice into a fine sieve under cold water for 30–45 seconds, moving it about with your fingers, until the water runs completely clear. This washes off the loose surface starch that would otherwise dissolve and turn the whole pot gluey. It is not an optional step.
Rinsed, drained rice into a saucepan with a tight-fitting lid, along with the cold water and the salt. One quick stir.
High heat with the lid off. The second it hits a full rolling boil, drop the heat to its absolute lowest setting and put the lid on tight.
Leave it entirely alone for 10–12 minutes. No lifting, no stirring.
Turn the heat off — but still do not lift the lid. Let it sit on the cold hob, sealed, for another 5–10 minutes. Lift it early and the steam escapes and you get hard, undercooked centres.
Lid off. You should see dry, fluffy rice with little steam holes across the surface. Fluff gently with a fork, never a spoon.