To streamline the assembly of the appetizers, you can make some preparations in advance. Slice and vacuum pack salmon fillet to thin (1 oz) portions. Fry corn tostadas or make bread toasts and keep them in an airtight container. Make chive-flavored soft cheese and prepare garnishes the day before serving.
Cream cheese can be substituted with Neufchatel or mild fresh goat cheese. Try to flavor the soft cheese with fresh tarragon or dill.
I listed fresh cherry tomatoes for the garnishing because they are the easiest to find. The original recipe uses pimentos. Any mild marinated or pickled red peppers will decorate these appetizers nicely.