1. Chop the candied orange peels.
2. In a bowl, whisk 150 g of softened butter and sugar until the mixture slightly whitens.
3. Add to the mixture, while stirring, the eggs one by one, then the vanilla sugar, candied orange peels, flour, baking powder, and salt.
4. Grease a 25 cm long non-stick loaf pan with 20 g of butter and pour the batter. Let it rest for 30 minutes at room temperature. Preheat the oven to 180 °C (350 °F).
Bake for 40 minutes.
5. Heat the apricot jam and orange juice in a saucepan over low heat, stirring until the mixture becomes smooth and slightly liquid.
6. Let the cake cool down, then remove it from the pan and glaze it with the apricot-orange mixture. Serve cold.