Lime juice in fish curries adds acidity to balance flavors, tenderizes the fish, and helps to prevent it from falling apart during cooking. It also brightens the overall taste profile.
Lime juice plays several crucial roles in fish curries. Firstly, its acidity cuts through the richness of the coconut milk or other fats often used in curries, creating a more balanced and palatable flavor. Without this acidity, the curry can taste heavy and one-dimensional.
Secondly, the citric acid in lime juice acts as a mild tenderizer for the fish. It gently breaks down the proteins on the surface, which helps the fish cook more evenly and prevents it from becoming too tough. This is especially important for delicate fish varieties.
Finally, lime juice helps to firm up the fish during cooking. The acidity coagulates the proteins, which helps the fish retain its shape and prevents it from crumbling or falling apart in the curry. This is particularly useful when simmering the curry for an extended period. The bright, citrusy flavor also enhances the overall freshness of the dish.
Add lime juice towards the end of the cooking process. Adding it too early can cause the fish to become overly acidic and potentially toughen it. Taste and adjust the amount of lime juice to your preference.