Chopping an onion for curry results in smaller, irregularly shaped pieces that cook down and blend into the sauce, while slicing creates longer, thinner pieces that retain their shape and add texture.
The method you use to cut an onion significantly impacts the final texture and flavor of your curry.
Chopping: This involves cutting the onion into small, roughly equal-sized pieces. The goal is not precision, but rather to create small fragments that will break down during cooking. When chopped onions are sautéed, they release their moisture and sugars more readily, creating a sweeter, richer base for the curry. They essentially melt into the sauce, adding body and flavor without being distinctly noticeable.
Slicing: Slicing involves cutting the onion into thin, even strips. This method preserves the onion's structure better than chopping. Sliced onions will retain their shape and offer a distinct textural element to the curry. They may also impart a slightly sharper, more pronounced onion flavor, as they don't break down as much during cooking. Sliced onions are often used when you want to see and taste the onion as a separate component of the dish.
Ultimately, the choice between chopping and slicing depends on the desired outcome for your curry. If you want a smooth, rich sauce with a subtle onion flavor, chopping is the way to go. If you prefer a curry with more texture and a more pronounced onion presence, slicing is a better option.
To avoid excessive tearing when chopping or slicing onions, chill them in the refrigerator for about 30 minutes before cutting. This slows down the release of the irritating compounds that cause your eyes to water.