To make the pie crust blend all the ingredients in a food processor or Thermomix at Speed 5 for 10 seconds.
Heat oven to 180C and place the pie crust into a 20cm square baking dish. Press down and bake for 10 minutes until turning golden.
Remove from oven whilst you prepare the filling.
Steam the sweet potato or use the Thermomix Varoma 100C for 20 minutes on Speed 1. Add 1 tbs butter and some salt to taste and mash. Allow to cool.
Place some olive oil in a fry pan and add the onion - cook until slghtly brown - add the garlic and ginger and cook for an other few minutes to soften and incorporate, then add the spinach until softened and stirred through the mixture.
When the sweet potato mash is cool enough add the eggs and onion mixture. Season with salt and pepper. Mix well and pour onto the pie crust.