To make the paste, simply place all ingredients into a blender and blitz everything together. Don't worry if the texture is not completely smooth - we are using fresh ingredients so a few bits and bobs are totally normal.
Thinly slice the steaks against the grain. Sear over high heat in a little oil. Do this in batches to not overcrowd the pan. Remove from the pan and set aside.
Lower the heat to medium and add 2 tbsp of cooking oil to the same pan.
Add the green curry paste and fry for 40-60 seconds until the aromas develop. Since it has many fresh ingredients, you may experience some splatters so use an oil splatter shield.
Pour in the coconut milk or cream, add 2 tsp of fish sauce and stir to combine.
Taste and adjust for salt.
Start adding the vegetables, pacing it based on their cooking times. Let simmer gently until they are done.
Once the vegetables are cooked, add the steak slices together with their juices.
Give everything another good mix and check the steak for doneness.
Garnish with fresh cilantro leaves and serve over white rice.