For the Streusel:
Half cup sugar
6 tablespoons all purpose, flour or gluten-free flour
1/4 teaspoon ground nutmeg
1/4 teaspoon ground cinnamon
1/2 teaspoon medium sea salt
4 tablespoons unsalted butter, cold, and cut into small pieces - 1/2 stick
For the cake:
1 3/4 cups whole-wheat pastry flour or 70% GF flour 30% rice flour
2 teaspoons baking powder
1 teaspoon fine sea salt
4 tablespoons unsalted butter, softened - 1/2 stick
1 cup sugar
One large egg
1 teaspoon vanilla extract
Half cup whole milk
1 1/2 cups fresh blueberries
1 1/2 cup peaches, cut up in small pieces