For the dip, mix the sour cream well with the remaining ingredients and refrigerate.
Sift rye flour, wheat flour, baking powder and baking soda. Stir in salt and sugar. Melt butter and let cool. Mix with eggs and buttermilk and add to flour mixture.
Bake waffles in a waffle iron until as crisp as desired.
Pluck smoked char into pieces, arrange on waffles and drizzle with dip.