If the tin is airtight, crispy Melba toast can be kept for a few weeks before it will taste stale. If it goes soft, it can be crisp again by heating it briefly in a hot oven. You can make Melba toast using ordinary sliced white bread. Toast the slices, cut off the crusts, and use a very sharp thin knife to cut each slice open and separate it into two thinner slices. Toast the inner slices under a grill, and leave the bread to cool. Store in an airtight tin.
** Asian Recipes