Knead the flour, 25 g sugar, salt, 125 g butter, egg and 2 tablespoons of water into a smooth short pastry. Cover and chill for about 30 minutes. Clean, peel and slice the pineapple.
Remove the hard stalk with a cookie cutter. Grease a tart mould (bottom 25 cm Ø; top 28 cm Ø). Spread pineapple slices on the bottom of the dish. Put 100 g sugar and 5 tablespoons of water in a large pan and let it caramelize golden yellow.
Remove pan from heat, add 25 g butter and melt while stirring. Pour the hot caramel over the pineapple. Roll out the dough round (28 cm Ø) on a floured work surface. Roll the dough loosely onto the dough roll and roll over the pineapple.
Carefully press the protruding edges of the dough downwards into the mould. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-30 minutes. In the meantime, roast the almonds in a pan without fat until golden brown, remove.
Leave the tart to rest in the mould for 10 minutes, then carefully turn it over onto a cake plate. Sprinkle with flaked almonds. Decorate with mint. Serve each tart with an ice cream scoop.