Feijoa and apple upside-down cake

Ingredients

• 175 gram Countdown Butter, softened
• 1/3 cup brown sugar
• 6 - 9 large feijoas, peeled and halved lengthwise
• 1 small apple, peeled and cut into 3cm cubes
• 3/4 cup Countdown Caster Sugar
• 1 teaspoon vanilla extract
• 3 eggs, at room temperature
• 1/2 cup ground almonds
• 1 1/2 cup plain flour, sifted
• 2 teaspoon baking powder
• yoghurt, ice cream or whipped cream, to serve