- For the Crumble: Mix by hand all ingredients until get an even wet sand texture. - 500 grams plain flour., 100 grams. granulated sugar., 250 grams grated cold butter. 
- Spread in a tray evenly in a thin layer. 
- Oven 180°C x for approx. 15 minutes. Stir every 5 minutes for even cooking. Sometimes it takes longer. 
- Fill: Peel the apples and cut them in small cubes. 
- Cook them in a casserole for a couple of minutes in low heat until they release a little juice. 
- Add brown sugar and mix gently to not break the apple cubes. 
- While cooking the apples cook white sugar in a pan until get caramel. 
- Add the Rum to the apples. 
- When the apples start to get softer add them the caramel and keep mixing gently. 
- Let it rest. 
- Serve: In a small container put the apple mix hot.  
- Over them put the crumble. It's recommended to toast a little more the crumble. You can use a torch or whatever you prefer. 
- Finish with a spoon of icecream. 
- Enjoy!