Peel, core, and cut the 3 apples into cubes. Toss with 1 tablespoon lemon juice and a pinch of cinnamon. Transfer to a saucepan with some water and cook over medium heat for 10-12 minutes until the apples are tender. If desired, mash lightly with a fork.
Allow the apple mixture to cool to room temperature, then layer alternately with 300 g yogurt in dessert glasses.