Opening a whole tin of anchovies for just 1 anchovy can be slightly inconvenient – I get it but it adds such a great umami flavour to this one pan leek pasta so I don’t recommend omitting it. If you can find anchovies in a small jar instead of a tin, this makes it super easy as you can seal them again and put in the fridge. You can use the other anchovies up in this Caesar Salad dressing or in this Puttanesca pasta.