Simple and succulent. Here's a Tarte Tatin recipe that works

70 Gramms Fresh Butter
110 Gramms Castor Sugar   
1/4 Lemon
1/2 Vanilla Seeds
3 large peeled Apples - cut in 8 segments each     
Fleur de Sel 
20 cm radius round puff pastry 
ca. 20 cm oven proof pan

Melt the butter on a stove in medium heat, add the sugar and the vanilla seeds. Cook at medium heat until a light brown caramel is developed. 

Take pan of the stove. Cover the apples with the puff pastry. Perforate the pastry several times with the tip of a fork. Sprinkle some fleur the sel or rock salt over the pastry. 

Put in the oven at 220° for about 10 minutes. Decrease the temperature of the oven to 170° and bake for another 10 minutes. 

Take the pan out of the oven. Put a fitting plate onto the apples and gently turn the pan over. Add some lemon juice over the apples to add some freshness.