The key signs a 'dum' cooked rice dish is perfectly done are a fragrant aroma escaping from the pot, condensation forming on the lid, and a slight change in the pot's sound when tapped. These indicate the rice has steamed sufficiently and absorbed the flavors.
'Dum' cooking is a slow, steam-based method where food is cooked in a sealed container. Determining doneness without lifting the lid requires careful observation. Here's a breakdown:
Aroma: The most obvious sign is the aroma. As the rice cooks and the flavors meld, a rich and fragrant aroma will begin to escape from the edges of the lid, even if it's sealed. This indicates that the ingredients have released their essential oils and the rice has absorbed them.
Condensation: Look closely at the lid. Condensation should form on the inside of the lid as the steam builds up. This shows that the moisture is being trapped and circulating within the pot, essential for 'dum' cooking.
Sound: Gently tap the side of the pot. Initially, you might hear a hollow sound. As the rice cooks and absorbs the moisture, the sound will become more muffled and solid. This indicates that the rice has expanded and filled the pot.
Time: While not a direct sign, knowing the approximate cooking time for your recipe is crucial. Combine this knowledge with the other signs for a more accurate assessment. Start checking for the other signs a little before the expected completion time.
Resist the urge to lift the lid frequently! Each time you open the pot, you release steam and heat, disrupting the 'dum' cooking process and potentially leading to unevenly cooked rice. Trust the signs and only open the lid when you're reasonably confident the dish is ready.