Try this Idli recipe recipe, or contribute your own.
Swapping idly rava for regular long-grain white rice changes the structural integrity of the steamed cake entirely, yielding a dense, compact disc rather than a spongy, aerated pillow. Fermentation relies on wild yeasts and lactic acid bacteria clinging to the urad dal and rice grains, which multiply rapidly when kept at a stable ambient temperature between 80 degrees Fahrenheit and 90 degrees Fahrenheit for at least twelve hours. Hand-mixing introduces beneficial microorganisms from the skin, accelerating this microbial activity far more efficiently than using a wooden spoon. Squeezing every last drop of moisture out of the soaked rava before incorporation prevents the starch matrix from becoming waterlogged and collapsing under its own weight during steaming. Protein molecules in the urad dal trap carbon dioxide gas released during the metabolic processes of fermentation, creating the characteristic rise when subjected to direct steam heat for exactly ten minutes in a covered vessel. Doubling this batch requires doubling the fermentation vessel capacity proportionally, because crowding the batter restricts the expansion of gas pockets and results in flat cakes. Ambient humidity and altitude heavily dictate how much cold water to add during the initial grinding phase, meaning adjustments must be made by eye rather than strict adherence to volume measurements.