Apple Chai Sourdough Scones

Name: Apple Chai Sourdough Scones
Ingredients: 1 cup sourdough starter, after peaking; 3 cups all-purpose flour; 1 tablespoon loose leaf high quality chai tea, ground in a motar & pestle or spice grinder; 2 teaspoons baking powder; 1/2 teaspoon ground cinnamon; 1/2 teaspoon salt; 1 cup sugar; 1 cup (or two sticks) salted butter, cold & cubed; 1/4 cup buttermilk (or heavy cream in a pinch); 1 teaspoon vanilla extract; 1 egg; 1 large firm apple, peeled, cored and roughly cubed into 1/4 inch pieces; 1/4 cup raw sugar for sprinkling (optional)