I used yellow mustard seeds for the recipe pictured. (paleogrubs.com)
Add to a pot with sugar, diced onion, grounded coriander seeds, two tablespoons of apple cider vinegar, one tablespoon of grounded yellow mustard seeds, salt and pepper. (greenevi.com)
I'm sure the recipe would work fine with yellow mustard seeds as well, just wont be as strong. (canned-time.com)