Dice ingredients as close to their cooking time as possible to minimize oxidation and moisture loss, preserving their freshness and flavor.
When you cut into fruits and vegetables, you break down their cell walls, exposing them to air and triggering enzymatic reactions. This leads to oxidation, which can cause browning, wilting, and a loss of vitamins and flavor. Similarly, cut ingredients lose moisture through evaporation, resulting in a less vibrant texture.
Therefore, the best practice is to prepare your ingredients right before you need them. This minimizes the time they are exposed to the elements. If you must prep ingredients in advance, store them properly. Here's a breakdown:
Plan your cooking process: Understand the order in which ingredients need to be added to your dish.
Dice just before adding: Cut vegetables and fruits immediately before they are required in the recipe.
Proper storage if needed: If you absolutely must dice ingredients ahead of time, store them in airtight containers in the refrigerator. For some vegetables like potatoes or apples, submerge them in water with a little lemon juice to prevent browning.
Don't overcrowd the cutting board! Overcrowding can lead to uneven dicing and increase the time ingredients are exposed to air. Work in batches for optimal freshness.