Happy hour at Petrossian in West Hollywood

DIY: blini topped with creme fraiche and caviar.  (Betty Hallock / Los Angeles Times)

The caviar martini, with vodka, a caviar-stuffed olive, cocktail onion and pressed-caviar cube, is $12 during happy hour.  (Betty Hallock / Los Angeles Times)

Fries served with ketchup in a caviar tin at Petrossian.  (Betty Hallock / Los Angeles Times)

The caviar burger slider with caviar aioli, Petrossian’s Papierusse (a sheet of sous-vide caviar) and egg, served with fries, is $15.  (Betty Hallock / Los Angeles Times)

Caviar with blini, creme fraiche, toast points and flutes of vodka.  (Betty Hallock / Los Angeles Times)

Caviar served with blini.  (Betty Hallock / Los Angeles Times)