1. Preheat oven to 375°F. Place first 8 ingredients (through baking powder) in bowl of food processor. Pulse to combine. Add fruit and butter. Pulse again 15-20 times to form a sandy texture. Stir in buttermilk; pulse just enough to combine.
2. Drop 8 spoonfuls (about 1/2 cup each) onto parchment-lined baking sheet. Dab cold water over surface of each scone to smooth. Sprinkle with about 1/2 tsp sugar, if desired. Bake until scones are golden and sugar has melted (about 30 minutes). Optional: Serve with fat-free Greek yogurt and sugar-free jam.