Place garlic, black pepper and cilantro roots in a medium size mortar.
With pestle, pound the ingredients until they form a fine paste, about 2 to 3 minutes.
Add brown sugar and soy sauce and stir in circular motion with the pestle until it well-blended and smooth.
Store in a mason jar in the refrigerator for a week, or freeze for up to 6 months. Please see suggestion above on how to incorporate this seasoning paste in your cooking.
Alternative preparation method: Place garlic, black pepper, cilantro roots, soy sauce and sugar in a blender and blend until it reaches the desired texture.