1. Mix flour, sugar, salt and instant yeast in a large mixing bowl. If using maple syrup do not add it yet.
2. Stir in warmed up plant milk. If using maple syrup (or other liquid sweetener), use 60 ml / ¼ cup less plant milk and add maple syrup to the milk before adding to the dry ingredients.
3. Stir everything together with a large wooden spoon. You may need to add a tablespoon or so more milk if the mixture is too dry to stick together roughly at this point but do so very gradually. When the mixture has mostly stuck together turn the mixture out on to a work surface or bread board.
4. Knead the mixture by holding one end of the dough in one hand and stretching it out with the other hand. You then reform the dough, turn it 90 degrees and start again. Halfway through the kneading incorporate coconut oil (solid not melted) into the dough. It will make the dough slippery at first, you might think it has been ruined – but it has not, it will make for a richer dough. Keep on kneading and the dough will become elastic and smooth soon. In total the kneading should take about 15 minutes for this amount of dough.
5. When the dough is smooth, form it into a ball and coat in a thin layer of oil. Place in a large mixing bowl and cover with a clean tea towel. Leave it in a warm place (but not too warm!) until it has doubled in size – about 1 hr. It’s a good idea to take a photo of the dough at the beginning so that you are sure when it has doubled in volume. While the dough is proofing, make the filling (see FILLING section below).
6. Once the dough has doubled in size, empty it out on to a work surface and push the air out with your fingertips.
7. Roll the dough into a large rectangle that is about 36 cm / 14″ wide. The height depends how swirly you want the buns, the thinner the dough the more swirls and therefore filling your buns will end up with – 40 cm / 15¾” height is what mine was.
8. Spread a thin layer (you don’t want the buns to end up soggy) of blended rhubarb all over the rolled out dough. Sprinkle evenly (!) with finely chopped candied ginger and raw rhubarb slices making sure they land on their sides for the most part.
9. Starting from the bottom, roll the dough tightly so that you end up with a 36 cm / 14″ long “dough snake”.
10. Now, depending on your baking dish, divide the dough into 9 or 12 even (4-3 cm / 1.5 – 1.1″) segments. I find that a square or round dish, like mine, needs 9 and a rectangular one needs 12 pieces. Use a long piece of sewing thread to do the cutting as it does not squash the filling as much as a knife does. Place the thread under the snake and overlap the thread on the top of the snake where you want the cut to be, pull tight to cut.
11. Place the segments, swirls face up, on a lightly oiled baking dish, leaving 1-2 cm between each bun. If you can fill the baking tray, this is ideal.
12. Leave the buns (covered with a kitchen towel) to prove again for another hour. Toward the end of this time, preheat the oven to 175° C / 350° F.
13. Brush the buns with the maple syrup + plant milk glaze and bake them for about 30-35 minutes, until golden brown. Cover the top with a piece of kitchen foil if you find that they are browning too quickly.
14. While the buns are baking, create the icing by combining a tablespoon or so of the rhubarb puree with icing sugar and mixing really well. Adding more rhubarb puree will make the icing pinker but it will set a little looser.
15. Take the buns out of the oven when they are lovely and golden, and brush them with maple syrup (or sugar syrup) while they are still hot.
16. Once they are cool, drizzle the rhubarb icing on top.

BUN FILLING

1. Heat up the oven to 200º C / 390º F.
2. Divide all your rhubarb into thirds. Cut one third of the rhubarb into very thin slices – they will be folded into the dough so they need to be thin to cook through as the buns bake. Cut the rest into 1″ / 2 cm long segments.
3. Toss the rhubarb segments in sugar (maple syrup or ginger stem syrup!) and bake until soft, it will take about 10 minutes (depending on the thickness).
4. Transfer to a blender and blend until super smooth. Set aside.