Buckwheat Waffles with Rhubarb Cream

gr- rhubarb (chopped)

- orange (zest and juice)

tbsp.- sugar (depending on the ripeness of your rhubarb more or less sugar is needed)

tbsp- water

cup- sweet vanilla cream (yours or store-bought (I used Madagascan Vanilla Cream from Sainsbury's))

cups- buckwheat flour

tsp- baking powder

tsp- baking soda

tsp-salt

tsp- vanilla

eggs (separated)

sugar

- kefir or buttermilk

cup- water

cup- Greek yogurt (plain)

cup- butter (melted)