Use a springform tin if you have one, about 9 inches (23 cm) in diameter. Line the bottom with a circle of cooking parchment.
2:
Caramelize the pineapple
Peel 1 Pineapples, cut into fairly thick slices and remove the hard central core.
3: Cut the pineapple slices in half. Using a non-stick frying pan, melt 20 g butter on high heat, then add 50 g brown sugar. Lay the pineapple pieces on top and caramelize...
4: ...on both sides.
5: When nearly done, add the juice of ½ lime and leave to reduce for a minute or two.
6: Arrange the pinapple slices flat in the bottom of the tin or mould so that they do not overlap. Preheat the oven to 390°F (200°C).
7:
Prepare the cake batter
Put 6 eggs and 100 g brown sugar into a food-mixer bowl. Beat until the mixture is pale.
13: Turn the cake out onto its serving plate as soon as it comes out of the oven. Remove the paper from the top and leave to cool before serving.
Remarks
If this is to be an "adult" cake (that no children will be eating - whatever else were you thinking?!), you can also add 2 tablespoonsful of rum with the lime in stage 5. If you would like a syrup to serve with the cake, after taking the pineapple out of the pan, deglaze it with 2 glasses of pineapple juice + the juice of a lime. Leave this to thicken on low heat. Serve in a sauce boat, preferably hot or warm.