Finding Fillings

It is my slow season, or relatively slow any way.  This is the time of year I get to play with menu items and experiment in the kitchen.  Right now I am working on this summer's appetizer selections.  I have a wonderful base shell. It is a cross between a Yorkshire pudding and a cream puff. It bakes up beautifully and keeps very well in the freezer. It can hold its taste and texture despite heat and moist fillings.  Right now  I am on the look out for fillings.
My immediate favourites are:

1. Lemon cream with smoked salmon,  
2. Cream cheese, ranch, Knorr vegetable medley,
3. Spinach & artichoke with cream cheese

I welcome suggestions. Watch my posts for images of these and other fillings.  The recipes that make the menu will be posted.