Begin with the dough. In the bowl of a stand mixer, whisk together 12 grams of active dry yeast and 165 grams of warm water. Add 375 grams of all-purpose flour, 5 grams of kosher salt, 55 grams of granulated sugar and an egg yolk. (Reserve the egg white from your egg for the nut topping). Using the hook attachment, mix on medium until all the ingredients are combined.
Once the ingredients are just combined, begin adding the softened butter 1 tablespoon at a time. When it is fully mixed in, that's when you know to add the next tablespoon of butter.
Turn the mixer to medium-high and mix the dough for 7-8 minutes, or until it is pulling away from the sides and incredibly smooth. You can also do the gluten test (see Note). Cover and let it rise for an hour, or until nearly doubled in size.
While the dough is rising, make the rhubarb filling. Thinly slice 12 ounces of rhubarb and add it to a large sauté pan along with 100 grams of granulated sugar. Cook over medium heat, stirring often, for 5-7 minutes, or until the rhubarb is a thickened jam.
Remove from the heat and stir in one tablespoon of butter at a time. Transfer to a bowl and mix in 1 tablespoon of lemon zest and 1 tablespoon of grated ginger. Set aside.
Assemble the rolls. When the dough is ready, roll it into a 12” by 18” rectangle. I don’t use flour since the dough is so pliable, but feel free to dust it with flour if you see fit. Spread the rhubarb filling thinly across the surface.
You can either roll up the long edge to make 9 cinnamon-roll-like buns, or you can make twists like I did. To do so, fold one shorter edge of the dough over so that it is touching the center of the rectangle then fold the other edge of the dough to meet that edge, kind of sealing in the jam. Then fold the dough in half like a book before slicing into 9 equal strips.
Take each strip, twist it, then gently fold the top edge and the bottom so that they are touching. The rolls don't need to look identical, they will all puff up and look beautiful. Place them into a 9x9-inch baking pan lined with parchment paper. Cover and let rise again for 1 hour, or until noticeably puffy and about 50% larger.
Preheat the oven to 375°F convection, or 400°F standard.
Make the ginger nut topping. Whisk an egg white until it is light and fluffy. Roughly chop 1/2 cup of nuts and add them to the bowl, along with 1/2 teaspoon of dried ginger, 1/4 teaspoon of kosher salt, 2 tablespoons of brown sugar and 1 teaspoon of fresh ginger. Mix to combine and spread onto a parchment-lined baking sheet.
Brush the rolls with egg wash, then bake the rolls on the lower rack and the nuts on the upper rack. The nuts will take 15–16 minutes, while the rolls will need 27–35 minutes, or until deeply golden.
While the rolls bake, make the icing. Use an electric mixer or your stand mixer to whip together 57 grams of softened butter and 57 grams of cream cheese. Add the powdered sugar by the spoonful, whipping until the icing is 50% larger and fluffy like whipped cream. Mix in 1 teaspoon of lemon zest.
When the nuts are out of the oven, let them cool, then give them a few tosses to break them up into crunchy pieces.
When the rolls are out of the oven, let them cool slightly before icing and topping with the ginger nuts (or, if you like melty icing, go right ahead). Enjoy!