Cut the cod into chunks. Set to one side.
Crush the Doritos until fairly fine and place in a large bowl (or on a plate).
In another bowl, mix the flour, paprika, cayenne pepper, salt and pepper together.
In a third bowl, beat the eggs together well.
Place each piece of cod in the flour mixture, then the egg (making sure you shake off any excess) and lastly, the crushed Doritos. Repeat with every piece.
Fry the nuggets in oil until they are golden brown on each side. Serve immediately.