Sorghum squash potbread

1. Combine all the dry ingredients in a bowl. Blitz the vegetables in a blender until smooth. Stir the vegetable purée and olive oil into the dry ingredients until a shaggy dough forms.
2. Gradually stir in the water until a pliable but sticky dough forms. Turn the dough out onto a floured surface and knead until firm and smooth.
3. Grease a bowl and place the dough inside. Cover with a tea towel and allow to prove for an hour. Twist the dough into rings and place on a greased baking sheet. Bake for 20–25 minutes or until golden brown. Serve warm with the butter.
4. To make the pistachio butter, place all the ingredients in a blender and blitz until smooth. Place in a container and refrigerate. Bring to room temperature 10 minutes before serving.
Photograph: Jan Ras