Add all ingredients into a high speed blender and blend until smooth.
Add a tablespoon or more of the paste to curries, etc. Stores well in the refrigerator.

1 onion
2 garlic cloves
2 lemongrass sticks
3 bird eye chilies, or to taste
5-6 cayenne peppers, red or green depending on what flavor of curry you want
handful of kaffir lime leaves
1 galangal
1 tablespoon ground cumin
1 tablespoon ground coriander