I wish I could say that I was suddenly struck with a moment of inspiration for this recipe but in reality it came about purely through the power of advertising. I was out shopping for food and picked up these, very cute looking, mini wholemeal submarine rolls. The packaging had a picture on it of the same rolls but enticingly stuffed full of egg mayonnaise and cress... and BOOM! I immediately wanted an egg mayo and cress roll too. What an impressionable soul I am! Especially when extremely hungry and in Marks and Spencers food department.