To a mixer jar add soaked red chillies with little water along with 2 tablespoon lemon grass, 1 tablespoon galangal, ¼ teaspoon lime zest, ¼ heaped cup shallots, 2 tablespoon garlic, 1 teaspoon rock salt, 4 two inches coriander stem, ½ teaspoon cumin seeds, ½ teaspoon coriander seeds, ¼ teaspoon white pepper corns and 1 teaspoon soy sauce. Avoid adding too much water.