You can prepare toasted bread appetizers a day or two ahead without sacrificing crispness: dry the toast thoroughly, cool it completely, and store it airtight at room temperature, keeping moist toppings refrigerated until assembly.
Essential Concepts
Store separately. Assemble shortly before serving.
Related posts:
https://www.loveandlemons.com/crostini/
https://www.simplyrecipes.com/recipes/bruschetta_with_tomato_and_basil/
