Sift the flours and the baking powder together. In a bowl, mix the egg yolks and milks together, add the sifted flour mixture, onion, lemon zest, chives, parsley, salt and pepper. Mix gently with a rubber spatula until the consistency of pancake batter, you may need to add a little more whole milk. Fold in the egg whites. On a hot griddle, melt a little butter. Ladle 3 to 4 ounces of the batter into the melted butter and flip when golden brown. Continue cooking until cooked all the way through.
Assembly: Place the warm blini on the serving plate. Spread the dill cream over the blini. Lay a piece of sliced salmon across the top of the blini, covering it entirely. Place a little more dill cream in the center of the salmon. Place the caviar on top of the dill cream. Sprinkle the chives and red onion on the salmon, for garnish.
Recipe courtesy of Wolfgang Puck