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.