the eggs and sugar with an electric whisk for about 5 minutes until light and fluffy.
-meanwhile, melt the margarine and milk in a pan.
-cool just a little bit before pouring onto the eggs & sugar mix, still whisking.
-add the flour, orange zest and baking powder and then fold in gently so that you don't knock out all the air you have whisked into the eggs. it is more like a batter mixture than a cake mixture so don't be alarmed if you think it looks thinner than a usual cake mix!
-pour into your cake tin and then arrange the sliced pears in rows on top of the mixture. they will 