Fresh herbs like coriander should be minced very finely for garnish, aiming for pieces no larger than 1-2mm to ensure even distribution of flavor and a pleasant texture.
The fineness of your herb mince significantly impacts the final dish. When garnishing, you want the herb's flavor to be subtle and evenly dispersed, not overpowering in any single bite. A fine mince achieves this by maximizing the surface area of the herb, allowing its volatile oils to release more readily and blend seamlessly with the other flavors. Larger pieces can be visually distracting and create uneven flavor distribution, where some bites have a strong herb taste while others have none. To achieve a fine mince, gather the herbs into a tight bundle, then use a sharp knife to rock back and forth, gradually reducing the herbs to tiny, uniform pieces. Avoid bruising the herbs by using a sharp knife and gentle pressure.
To prevent your minced herbs from clumping together, especially if you're not using them immediately, toss them lightly with a tiny bit of oil before storing them in an airtight container in the refrigerator. This helps keep them fresh and prevents them from sticking.