Preheat the oven to 180°C. Grease a 25 cm springform or loose-bottomed pan and line the base with greased baking parchment.
Melt the chocolate in a heat-proof bowl set over (not in) gently simmering water. Whisk the olive oil into the warm chocolate and set aside.
Whisk the egg yolks with caster sugar in a separate bowl until pale and creamy.
Fold the chocolate and rum into this followed by the ground almonds.
In a clean bowl, whip the egg whites into soft peaks. Vigorously whisk a tbsp of the egg whites into the almond mixture loosen it. Then gently fold in the remaining egg whites.
Pour the batter into the prepared tin and arrange the halved strawberries (cut side down) in concentric circles to cover the surface of the cake.
Bake the cake for 40 mins or until you insert a toothpick into the cake and it comes out clean with no wet batter clinging to it. Cool the cake in the tin for 10-15 mins and then unmould and cool fully on a rack.