Place all the —raisins, minced ginger, water, cayenne pepper, salt, and lemon juice—into the container of a blender or food processor.
Blend on high, pulsing as needed, until you achieve a coarse, textured paste. You will likely need to stop the machine and scrape down the sides with a spatula a few times to ensure everything is evenly combined.
Scrape the chutney into a clean jar or an airtight container. It's ready to serve immediately, but the flavor improves after resting. This will keep for up to 2 weeks in the refrigerator.
Let the chutney rest in the refrigerator for at least an hour before serving. This allows the sweet, spicy, and tangy flavors to meld and deepen.