Preheat oven to 180C / 160C fan and lightly spray a baking tin of about 30cm x 20cm size with low fat cooking spray and line the base with greaseproof paper.
Use scissors to cut the apricots into small pieces into a hand mixing or stand mixer bowl.
Grate the rind off the oranges, avoiding any white pith going into the bowl.
Squeeze the oranges to get the orange juice you'll need for the topping and put aside.
Sift the flour into the bowl, add the oil, brown sugar and baking powder.
Break the eggs into a separate bowl and lightly whisk these together before adding them to the rest of the mixture.
Beat the mixture firmly with a wooden spoon or use a stand mixer paddle on lowest speed to mix all of the ingredients together.
Scrape all of the ingredients from the mixing bowl into the tin. Smooth the top flat.
Bake for about 30 – 40 minutes. Once the mixture has risen and turned a golden colour use a wooden skewer to check that the middle is cooked. (Skewer should come out clean from the mixture).
Remove from oven. Allow to cool for a few minutes then remove, carefully, to a wire rack to cool completely.
Once cooled, make the cream cheese topping by mixing the quark, orange juice and icing sugar together and spread evenly over the top.
Slice into 15 equal slices.