Mix flour and groats, press a depression in the middle. Warm 5 tablespoons of milk lukewarm. Add 1 pinch of sugar and dissolve yeast. Pour into the hollow. Mix with some flour from the edge to the pre-dough. Cover and leave to rise in a warm place for about 15 minutes
Warm the remaining milk and butter. Add 1 pinch of salt and egg to the pre-dough, mix everything smooth. Cover and leave to rise for another 30 minutes
Wash the dill, dab dry and cut finely, except for a little to garnish. Mix yoghurt, sour cream and mustard. Season to taste with salt and pepper. Stir in dill. Cut salmon into strips
Heat the oil in portions in a coated pan. Fry 12-16 blini from the dough in it at medium heat until golden brown, keep warm. Arrange the blini with mustard cream and salmon. Garnish with the rest of the dill