1

Whisk first 5 ingredients (trhough salt) in a medium bowl.

2

Place milk and butter in small saucepan. Stir over low heat until butter melts and thermometer registers 110°F (if mixture gets too warm, cool until temperature returns to 110°F). Pour warm milk mixture into flour mixture and whisk until smooth. Cover with plastic wrap and let stand in warm draft-free area until doubled in volume, 1 to 1½ hours.

3

Whisk buckwheat batter to deflate; then whisk in eggs. Do ahead tip: Can be prepared to this point 1 day ahead. Transfer to large bowl. Cover; chill (may increase in volume; rewhisk before using).

4

Preheat oven to 200°F. Heat griddle or large skillet over medium heat. Brush lightly with melted butter. Working in batches, pour a large Tablespoonful of batter for each blini onto griddle, spacing apart. Cook until bubbles form on top and begin to pop, about 1½ minutes. Turn blinis; cook until golden brown on bottom, about 1½ minutes. Transfer to baking sheet. Tent with foil and place in oven to keep warm while cooking remaining blinis. Do ahead tip: Blinis can be made 1 day ahead. Cool, cover, and chill. Brush blinis lightly with melted butter and rewarm on baking sheet in 350°F oven 5 minutes.

5

Arrange warm blinis on platter. Top with piece of salmon and then a small dollop of crème fraîche. Garnish with a small dill sprig and serve.