This is taken from the German GF booklet. I tried it yesterday and it turned out like pizza topping on mashed potato. I obviously did something wrong, but maybe yours will turn out better.
Ingredients:Dough600g water
650g floury, unpeeled potatoes
75g potato starch
1 egg
1 tbsp olive oil
1/2 tsp oregano
1 tsp salt
2 pinches pepper
1) Pour water into jug, put potatoes in basket and cook 30M/Varoma/speed 1. Allow the potatoes to cool - overnight is best - and peel.
2) Put starch, egg, oregano, salt and pepper into the jug.
3) Press the cold potatoes through a "Spätzle press" (or grate them coarsely, as I did) and add to jug. Mix ingredients 30s/
/speed 3, using the spatula if necessary.
4) Grease a pizza baking dish (28-30cm) or spread onto a baking tray that has been covered with greaseproof paper. Press down the dough.
Topping:100g Edam cheese
1 onion, halved
1 clove of garlic
20g olive oil
1 tin of tomatoes (400g), drained of juice
1/2 tsp salt
1/4 tsp pepper
1 pinch of sugar
1 tsp oregano
1) Grate cheese 4s/speed 6. Fill into another bowl.
2) Chop onion and garlic in the jug 3s/speed 5.
3) Add oil and cook 3m/Varoma/speed 1.
4) Add tomatoes and chop 5s/speed 5.
5) Add salt, pepper, sugar and oregano and reduce 8m/Varoma/speed 1. Allow to cool slightly before you spread it over the pizza dough.
6) Sprinkle cheese over the top and bake in pre-heated oven.
Temperature: 200C
Baking time: 40 minutes