German Apple Cinnamon Pancake

This is inspired by an other recipe from SortedFood. But actually it is in a way my Mom made them as long as can remember, but she only use the hob and not the oven.
My take on the recipe reminded me of my childhood.
It is basically a German heavy pancake with cooked apples and cinnamon.

recipe:
250 ml milk
2 eggs
125 g flour
1/2 tsp salt
1/2 tsp baking powder
30 ml sparkling water
1 tsp caster sugar
1 apple
2 tbsp butter
1 tsp brown sugar
2 tbsp apple jelly
double cream

Make the batter first, just add milk and eggs, salt and 1 tsp of sugar  to a blender. Follow with flour and baking powder and add some salt.  Give it a good mix and let it sit for 30 min, then add the sparkling water.
Preheat the oven 180 C grill.
Core and peel the apple and use a wide oven proof pan and melt the butter. Cut the apple into rings and saute them with some cinnamon. When they are done, sprinkle some brown sugar on top and caramelize them.
Add the batter and cook the pancake on the stove until the one side is getting color.
Stick the pan under the grill and let the top batter get done.
Brush some apple jelly on top and whip the cream and serve with some more cinnamon.