In a clean sterilized glass jar, place mustard seeds, ginger and garlic. Pour apple cider vinegar so that the contents of the jar are completely covered.

Let this jar sit at a cool room temperature for 24 hours.

Blend this mustard-vinegar mixture with salt, cayenne pepper, turmeric and sugar to make a smooth or grainy paste according to your preference.

Transfer this mustard paste into a clean sterilized jar and let it sit at a cool room temperature for 3 days.

Refrigerate this mustard sauce after 3 days.