While the dough is proofing, take 28 grams of butter (2 tbsp) and generously coat the bottom and sides of your 13x9 pan.
Wash the chives and finely chop. Set aside
When the dough has doubled in size, punch it down a bit then turn out onto a floured work surface and stretch it into a square.
Roll the dough out into a 12 inch square and sprinkle the chopped chives evenly over the top. Loosely roll the dough up, enclosing the chives. Press the roll down into a rectangle using your hands.
Roll the dough out again into a 16x6 rectangle. Using a bench scraper, cut the rectangle into 24 pieces by making two cuts long-ways and seven cuts short-ways to make an 8x3 grid. See photos above for a step by step of this process.
Take one piece of dough and pinch the edges together to form a teardrop shape. Place the dough seam side down on your work surface, do not add flour to your work surface, you want the dough to stick a bit to help form it into a ball.
Holding your hand like a claw, use the palm of your hand to press into the dough and move in a circular motion to form the dough into a ball shape. Place the prepared dough ball into the prepared pan. Repeat with the other 23 pieces of dough, arranging the dough in a 4x6 grid. Move quickly so the dough can rise evenly for its second proof.
Cover the pan with cling film and proof for another hour or until the dough has doubled in size. While the dough is proofing, preheat the oven to 375 degrees Fahrenheit and place a rack in the center of the oven.
When rolls are ready, beat remaining egg and brush on top of the rolls. Sprinkle the tops of the rolls with flaky salt and ground black pepper.
Bake for 25-30 minutes or until the tops of the rolls are a deep golden brown.
Once rolls are done, brush the tops of the rolls with the remaining 28 grams (2 tbsp) of butter and add any additional salt you want. Let the rolls cool in the pan for 15 minutes.
Cut around the edges of the pan and then use a spatula to remove the rolls from the pan and place on a wire rack to cool. Serve warm.