Remove the crusts from each slice of bread using a sharp knife.
Lightly toast the bread on both sides until pale golden, usually around 3-4 minutes in a toaster. Don't let it get too dark, as it will be toasted again.
While the toast is still warm, carefully slice horizontally through the middle of each slice using a serrated knife. You should have four much thinner pieces from your original two slices of bread.
Cut each thin piece diagonally into four triangles. Two slices of bread should give you sixteen Melba toast triangles.
Place the triangles on a baking tray with the freshly cut sides facing upwards. Toast under a preheated medium grill for around 1-2 minutes, or until golden and crispy. Watch closely, as they can burn in seconds. Allow to cool before serving.
Notes
Use a serrated knife to make splitting the toast easier.
Cut the bread while it is still warm from the first toasting.
Watch carefully during the second toasting to prevent burning.
Cut festive shapes before the bread becomes too crispy.
Save leftover crusts for breadcrumbs.
Cool completely before storing in an airtight container.