You need:

• 2 slices of brown bread
• 2 handfuls of grated cheddar cheese
• 1 standard-issue tin of sardines in tomato sauce (you can also try the more exotic version in chilli sauce)

Get cracking:

• Put the cheese on the bread and cut each slice into three fingers. 
• Taking great care with culinary aesthetics, put a sardine atop each piece of bread.