Cornish Potato Cake with banana

The original for this recipe came from Great British Potato Recipes, published by the Potato Marketing Board in 1983. It's a very under-rated recipe book because it contains some brilliant things to do with spuds- here is my take on one of them!
I add the banana or apple to give it a more fruity taste, the traditional recipe leaves these out.

2 small or 1 medium potato
300g flour ( roughly)
1 knob of butter
1 handful of sultanas
1-2 teaspoons of nutmeg
1-2 teaspoons of cinnamon
1 overripe banana or stewed apple
A splash of lemon juice.

There are two top tips with this recipe:

1. This recipe needs more spice than you think.
2. If in doubt, over cook this recipe. The texture is awful if it is under cooked.

Prep time: 10 min
Cooking time: 40 min

1. Peel the potato (s) and chop them. Place in a pan of water and bring to the boil.
1.a Pre--heat the oven to 200°C

2. Cook the potatoes until they are soft.
3. Once the potatoes are cooked add the butter and mash them well.
4. Mash the banana ( or apple) and lemon juice together, then add to the potato.
5. Add the sultanas to the banana and potato.
6. Slowly stir the flour into the mix until it forms a soft dough.
7. Spread the dough onto a greased baking sheet and flatten down with a fork, keeping the ridges in the dough.
8. Cook in the top of the oven for 20-30 min, or until well browned.
9. Eat hot or cold, with butter, jam or on their own :)