Heat oil in a pan or preferably a flat bottomed kadai, add butter & once it melts, add garlic, green chillies, curry leaves and saute for a minute on medium until garlic turns golden. Add green chilli paste and saute for ½ a minute till the rawness goes. Add 2 tablespoons of coriander leaves and saute for a few seconds till they wilt. Add coconut milk, water, salt, pepper and bring to a boil on high and simmer for 1-2 minutes
1 teaspoon groundnut oil or cooking oil, 1 tablespoon butter, 1 tablespoon finely chopped garlic, 1 green chilli, 1 sprig curry leaves, 2 teaspoons green chilli paste, 3 tablespoons finely chopped coriander leaves, ½ cup thick coconut milk, ¼ cup water, ¼ teaspoon salt, ¼ teaspoon black pepper