Ginger and garlic paste is an essential ingredient of North Indian cooking. It is always best to use fresh ginger and fresh garlic to prepare the paste and there is nothing better than using homemade, although alternatives include using other forms such as frozen or readymade pastes available at supermarkets.
To make the paste yourself, the key is to use equal amounts of fresh ginger and garlic (peeled) and grind the ingredients in a small grinder with a few drops of water to combine. I find a coffee grinder works best. Alternatively, a pestle and mortar and the back of a chef’s knife will also crush the ingredients suitably although, these methods take longer. The fresh paste will last in the refrigerator for a good 3-4 days. You may also want to make the ginger and garlic paste in large amounts and then freeze it for future use. Freezing it in an ice-cube tray is a great idea as one cube of ginger and garlic is usually suitable for a portion of curry or whatever your dish.