The problem with canapés is that they inevitably require a bread or pastry base to make them remotely practical for handing around with drinks. This is fine if you’re attempting to line your stomach for the Christmas excesses of mulled wine or champagne, but not so great if you’re watching your figure or saving room for dinner. These omelette pinwheels are fairly low-maintenance as canapés go, and the standard omelette recipe can be used with all sorts of spreads and cured fish or meat.