Place all ingredients in a bowl and season with salt. Set aside to marinate at least 24 hours in an airtight container.
Blend all ingredients until very smooth.
Slather Mango Mustard on all 10 warm buns; distributive evenly. Add grilled bratwurst.
Evenly distribute Mango Kimchi between all 10 bratwurst.
Garnish each bratwurst with ½ teaspoon of cilantro.
Pick each assembled bratwurst, divided in half, then cut in half and serve.
*To serve smaller portions, cut assembled brats in half on the bias into 2 halves to serve smaller portions, with a pick through each portion. Recipe courtesy of Chef Dave Woolley