Firstly, prepare the avocado salsa placing all the ingredients into a blender.
Now grate the sweet potato with a large hole grater and place it into a bowl. Then add all the other ingredients: chopped onion, flour, egg, salt, and pepper. Mix well
Warm a pan with plenty oil and then form the pancakes with a spoon. Cook for about 4 minutes per side, until golden.
For the poached eggs: bring water to the boil in a medium sized pot with 2 tablespoons of white vinegar and break the eggs into two different bowls. When the water is boiling, reduce the heat, stir up a vortex with a spoon and after a few seconds tip in an egg. Allow to cook for about 2 minutes and then lift out with a slotted spoon.
Plate the pancakes with the avocado sauce, the poached egg, and a slice of Prosciutto di San Daniele.