Pre-heat oven to 350°. Grease and flour an 8" springform cake pan.
In a medium bowl mix together peaches and sugar, set aside.
In a large bowl whisk together flour, sugar, baking soda and salt, add butter using a pastry blender or fork combine to form a crumbly mixture.
Add eggs, the Fiori di Sicilia or Vanilla Extract, and yogurt and continue to mix until just crumbly.
In a separate bowl, blend flour, light brown sugar, and butter to make a streusel-like topping
Add crumbly cake batter to the springform pan, spoon peach mixture on top and sprinkle with streusel mixture.
Bake for approximately 30-40 minutes or until lightly golden on top. Let cool.
Spoon the 4 freshly sliced peaches on top.
Enjoy!