How to:
Hummus one:
Saute the onion in some oil and add sugar to caramelize it and the let it cool down in the fridge.
Either make your own hummus or use a store bought one. Take 2 slice of bread and spread a generous amount of hummus one them. Add the caramelized onion and and a few slices of tomato and put the two slices together.
Cut of the crusts making it into a square and then cut the sandwich in diagonally turning them into triangles.
Cream cheese one:
Slice the cucumber with a mandolin or a swedish cheese slicer. Add salt and let i rest for about 5 minutes. Then remove all the moisture with paper towels. Spread a good amount of cream cheese on 2 slices of bread and add the cucumber in the middle. Cut off the crusts and then cut the sandwich in the middle turning the square into 2 rectangles.
Make sure that everyone gets half a sandwich of both types.