Keep the caviar refrigerated until ready to serve. When serving, serve by placing caviar tin in a bowl of crushed ice to keep cold.
To hard boil the egg, place in a saucepan with water, bring to a boil, remove from heat and cover with a lid. Set timer for 12 minutes. Drain and place in cold water to cool. Peel egg and slice in half and separate the egg yolk and egg white. Separetely finely dice the egg white and separately grate the egg yolk.
Finely dice the red onion, as small as you can.
Prepare your caviar plate by placing the iced caviar, surrounded by grated egg yolk, egg whites, diced onion, sour cream, dill and optional lemon wedges.
You're now ready to build your own Blini with Caviar. Spread sour cream on the blinis, add a bit of egg yolk, egg whites, onion and dill, then top with caviar. Enjoy!