In Indian and Bangladeshi cooking, bhuno describes the process of frying down a tomato-spice base until the oil visibly separates from the masala — pooling at the edges of the pan in golden-orange rivulets. This is not a cosmetic cue; it is a flavour signal. Until the oil separates, the tomatoes and spices have not fully broken down and integrated. Water still present in the tomatoes creates a barrier between the fat and the spice molecules, preventing the deep, rounded flavour development that defines a great curry base. Cooking to separation — typically 6–8 minutes of active stirring over medium-high heat — drives off residual water, concentrates the natural sweetness of the tomatoes, and creates a dense, aromatic paste that forms the flavour backbone of the entire dish. Ismail's curry was praised by the judges for 'a fantastic level of heat, just right' and 'lots and lots of flavour without being overpowering' — the bhuno stage is where that balance is built. Do not rush it.