Divide the first 3 ingredients into half in two separate bowls. In one bowl add 1/2 tsp of salt and beetroot puree, in the another bowl mix 1/2 tsp of salt and squash puree.
Add enough water and knead it into two separate dough. Cover the bowl with cling film and leave it in a warm place to rise.
When the dough has risen knock the air back and knead it briefly.
Pre-heat the oven to 200 degree C. Now roll out the beet dough into long log shape. Then roll the squash dough into a rectangle. Place the beet dough into the squash dough, seal the edges. Join the ends to form a ring shape.