Instructions: Preheat oven to 180 C, 350 F, Gas Mark 4.

Butter a 10cm (4 inch) loose bottomed cake tin.

Place the polenta, flour, baking powder and caster sugar in a food processor with the orange zest, process to combine.

Add the butter and process until it resembles fine breadcrumbs.

Combine the orange juice, egg and oil together, with the motor running slowly pour into the processor through the feeder tube.

Once combined, stop the machine and press two thirds of the dough into the prepared tin.

Combine all the filling ingredients together and pile onto the base, leaving a border of about 1cm ( 1/2 inch) round the edge.

Crumble over the remaining mixture and cook in the oven for 45-50 minutes until golden brown.

NOTES : An alternative to a traditional style cake.Ideal served with cream or creme fraiche.

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