Make the dough. Add the yeast, milk, and 1 tablespoon of sugar into a small bowl and mix well. Set to one side for 15 minutes until foamy. In the bowl of a stand mixer fitted with the dough hook, add the flour, remaining sugar, and salt. Quickly mix them together. Add the foaming yeast mixture, eggs, and vanilla bean paste and mix on low for 5 minutes until the dough comes together.
Add butter and knead. Then add the butter gradually, whilst the mixer is running on medium and once incorporated, turn the mixer up and knead for ten minutes. The dough should be pulling away from the sides of the bowl but have formed a ‘tornado’ around the dough hook.
First rise and refrigeration. Tip the dough onto a greased worktop and pull the corners into the centre. Turn over so that the seams are underneath and place the dough ball in a greased bowl and cover with cling film and let rise in a warm place for 1 ½ hours.
Deflate the dough and refrigerate. Once doubled in size, gently punch down the dough, form it into a rectangle, and wrap it in cling plastic to cool. Refrigerate for 1 hour or freeze for 30 minutes (my preferred option).
Prepare the pan and roll out the dough. Line a 23 x 30cm (9 x 13-inch) baking pan with parchment paper. Once cold, on a lightly floured surface, roll the dough into a rectangle approximately 30cm wide x 45 cm long (12in wide x 18in long).
Cover the dough in strawberry jam. Spread the strawberry filling evenly onto the surface using an offset spatula. Leave a small gap all around the edge.
Slice and Roll. Using a sharp knife, slice the dough horizontally into 12 strips. For accuracy, use a ruler and mark the edges to get even-width strips.From one side, roll each strip up. Place in the prepared pan with the scroll facing up. Repeat with the remaining strips. Leave space all around each scroll. Second rise, then bake. Cover with plastic wrap and let the dough rise for 45 mins to 1 hour until risen and puffy. Preheat oven to 180°C (350°F). Bake for 35-40 minutes until golden brown. Remove from oven and leave on a wire rack to cool slightly.