James Beards' Onion Ring Sandwiches

In my experience these are pretty much a love or hate proposition.  If you love onions as much as I do, they're a huge hit.  They're also very pretty, very easy, and a surprise to most people when you set them out with drinks.

Onion Rings

1 loaf brioche or challah, cut into 1/4 inch slices

mayonnaise

4 small onions, very thinly sliced into rounds

sea salt

1 cup chopped fresh parsley 

Cut 1 1/2 inch circles out of the brioche slices with a cookie cutter. 

Slather mayonnaise on the little circles. 

Sprinkle with salt. 

Place a circle of onion on a circle of bread and sandwich it between a second piece of bread. 

Roll the edge of the sandwich in the mayonnaise and then the  parsley.

Hold it together with a fancy toothpick.