Ingredients

The makings of the

1
Combine all the ingredients (except the bread and cheddar) to make a cheese and onion spread – top tip – I tend to start with dry and move onto wet ingredients for ease of mixing.
2
Ideally, allow the cheese and onion spread to sit for as long as possible, perhaps making a day in advance, this allows onion flavour to build.
3
Construct the sandwich by putting half the cheese and onion spread on each slice of bread, then add the slices of mature cheddar cheese and the lettuce leaves and close.