In a blender, combine spinach/basil leaves, boiling water, egg, salt, and olive oil to create a green mixture.
Pour the flour onto a clean surface. Make a crater in the centre of the flour and pour in the green mixture. Gently whisk the wet ingredients with a fork, bringing in the flour from the edges. Add more flour if the mixture is too wet. Add more water or olive oil if the dough is too dry.
Knead the dough for 5 minutes and then set aside in cling film.