In a medium saucepan combine water, 1 cup milk, salt, spices and vanilla and stir. Bring to a boil, add buckwheat groats, stir then cover and reduce heat and let simmer, stirring from time to time, for 15-20 minutes, depending on the texture and amount of chew you prefer.
Remove from heat and stir in ¼ cup milk, raisins and pistachios. Cover and let sit for a few minutes.
Transfer to serving bowl and garnish with a dollop of fat free plain Greek yogurt as well as a few extra raisins and chopped pistachios.
Pour in a little bit more milk for an even creamier texture, if desired.