Prep all of your ingredients.
Heat up a fry pan on high. Then add 1 tbsp of oil and half of the chicken. Cook until 90% done and leave aside. Repeat with the other half.
Take the pan off the heat and add let it cool for a minute and then add the curry paste.
Put the fry pan back onto the stove on medium high and cook for 30 seconds.
Add the chicken, sugar and fish sauce. Stir through and cook for a few minutes.
Add the chopped beans and cook for one more minute.
Check for seasoning and adjust according to your taste.
Garnish with chopped kaffir lime leaves.