Preheat the oven at 175ºC/350ºF conventional oven and prepare a 23 cm/9-inch springform with parchment paper.
In a large mixing bowl, sift all-purpose flour, baking powder, and salt. Then add granulated sugar and mix it together so everything has been combined.
220 g all-purpose flour, 1 ½ teaspoon baking powder, ¼ teaspoon salt, 150 g granulated sugar
Then add the butter and with a hand mixer or in a stand mixer, using the paddle attachment, mix it together until the butter has coated the dry ingredient and it looks like a sandy texture.
85 g butter
Then add the eggs, Greek yogurt, oil and vanilla extract and with the electric mixer mix it all together until smooth and combined. It's a thicker batter.
2 eggs, 150 g Greek yogurt, 25 g vegetable oil, 1 teaspoon vanilla extract
Cut the peaches into small pieces, so they are similar in size to a blueberry or raspberry. Toss the peaches in cornstarch. Add ⅓ of them into the cake batter, and gently fold them in, using a rubber spatula.
200 g peaches, 1 tablespoon cornstarch
Add the cake batter into the prepared cake pan and top it with the remaining peaches. Finally top it with the crumble.
Bake it for 45-55 minutes or until the cake tester comes out clean. Once baked, let the cake cool. After 10 minutes, gently drag a thin knife along the edge of the cake to release the cake from the springform. Let it cool down completely on a wire rack.