Work the flour with the powdered sugar, egg yolk, salt and pieces of butter into a smooth ball of dough. It is best to use your hands to firmly crush the butter with the ingredients. Chill for 1 hour.
Roll out the dough thinly and place in a greased tart pan (approx. 20-24 cm in diameter). Carefully press into the edges of the mold and cut off the excess at the edge.
Peel, quarter and core the apples and cut into 1 cm wide slices. Mix with 2 tablespoons of lemon juice. Cover the dough with the apple slices like a roof tile and sprinkle with the brown sugar.
Bake the tart in the oven preheated to 200 ° C with top / bottom heat on the bottom rack for 30-35 minutes until golden brown.