Fenugreek seeds in idli batter help improve fermentation, resulting in a softer, fluffier idli, and also contribute a slightly tangy flavor.
Fenugreek seeds, also known as methi seeds, are a crucial ingredient in idli batter for several reasons. Firstly, they contain natural enzymes and compounds that aid in the fermentation process. These enzymes break down the starches in the rice and urad dal (black lentils), making them more easily digestible for the microorganisms responsible for fermentation. This enhanced fermentation leads to a greater production of carbon dioxide, which creates air pockets within the batter. These air pockets are what give idlis their characteristic light and fluffy texture. Secondly, fenugreek seeds contribute to the overall flavor profile of the idli. They impart a subtle, slightly tangy, and nutty flavor that complements the other ingredients. The amount of fenugreek used is typically small, so the flavor is not overpowering but rather adds a pleasant depth to the idli. Finally, fenugreek is believed to have some health benefits, including aiding digestion and regulating blood sugar levels, although these benefits are present in small quantities when used in idli.
Soak fenugreek seeds separately from the rice and urad dal. This allows you to control the soaking time and prevent the fenugreek from overpowering the flavor of the batter. Typically, a shorter soaking time is sufficient for fenugreek compared to the lentils and rice.