1. Preheat oven to 180C (360F). line an 9-inch (22-23cm) springform pan with parchment paper and grease with butter.2. In a large bowl mix flour, oats, cinnamon and sugar. In a separate bowl grate peeled apples and mix them with fresh lemon juice. set aside.3. For the first cake layer: grate 2 tablespoons (30g) cold butter on the bottom of the pan, sprinkle 3-4 tablespoons of the oat mixture, then lightly press. Evenly spread 1/3 of the shredded apples with the juice. Repeat the same process 2 more times: oat mixture (1/3 of the remaining), apple mixture, oat mixture, apple mixture, oat mixture and. Finely, grate the remaining 120g cold butter on top of the cake, sprinkle 1 tablespoon sugar.4. Bake for 35-40 minutes, until golden brown on top. let cool 20 minutes, release from the pan and let cool completely.More dessert recipes you may like:Easy Apple Cake RecipeRaspberry Oatmeal SquaresEasy and Healthy Oatmeal Cake