Add in water to a container and put in 4 eggs out of the six in it such that they properly dip in the water and then boil the water and after the boil, switch of the flame and cover it and keep it still for 4 minutes, then drain the water and add in ice-cold water to make the eggs cool.
Now, as the eggs are cool, crack the shells and peel the eggs under the water tap, then again put the eggs in ice-cold water and cover it and let them cool in a fridge for almost 1 day.
Take a bowl and put in the flour. In another bowl, take cornflakes. Take the sausage and cut it into 4 equal parts. Put in 1 boiled egg on half sausage and completely wrap it with the other half of the sausage. Do it with the left eggs too.
In a bowl, whisk in 2 of the eggs and blend them properly. Then, take the sausage-wrapped eggs, dip them into flour and then into the egg wash and lastly, the cornflakes. After coating, keep them uncovered in the fridge for 1 day.
Take a large pot, put in the vegetable oil and heat in under medium heat. When you feel the oil is hot enough, put in the eggs and keep occasionally stirring for 6-7 minutes. When the coating is golden brown, take them out. Then, put the eggs into tissues to remove extra oil.
At last, season with salt and pepper and serve it with mustard.