Apple & plum sponge pudding

2oz trex or butter (plus extra for greasing dish)
1 egg, beatened
1/2 tsp baking powder 
4oz Plain flour 
2oz brown sugar
1 ripe banana mashed
1 tbsp caster sugar
3 apples
6 plums, stones removed and quartered 

1)peel, core and chop the apples and pop in a small pan. Cover with water and sprinkle over 1 tbsp of caster sugar. Bring to the boil and turn down and simmer for no more than. 5 mins. Remove from the heat, drain and put to one side. 
2)cream together the trex and brown sugar then add the beaten egg and mix in well
3)sift in the flour and baking powder and fold in well
4)stir in the mashed banana 
5)grease an ovenproof dish and spoon in the apple and mix in the plums 
6)top with the banana sponge mix and pop in a preheated oven at 180 degrees and cook for 30 mins until sponge is golden. Test to see if cooked with a skewer and if it comes out dry it's done!

✔️Top tip: if you don't like banana leave this out of the sponge mix but add 1/2 tsp of vanilla extract