Combine the milk and bread flour in a medium saucepan. Place over medium heat and cook, stirring continuously, until the mixture thickens into a paste. Remove from heat and transfer to the bowl of a stand mixer.

Add the cold milk and mix to combine, checking with your finger that it is not hotter than lukewarm (the cold milk should cool the hot tangzhong enough). Add the sugar, yeast, milk powder, salt, flour, and oil. Transfer the bowl to the mixer and fit with the dough hook.

Mix the dough on medium speed until it is smooth and elastic and clearing the sides of the bowl, about 12-15 minutes. Don’t freak out, as it is sticky - if you have made it by weight you will be fine. Set a timer and walk away from the mixer if you need. If after that time it really isn’t coming together and you’re worried, add flour a teaspoon at a time just until the dough just comes together.

The dough should be smooth and elastic, and pass the windowpane test.

Turn the dough out onto a surface and flour or oil very lightly if needed to bring into a tight ball with a bench scraper. Transfer to a bowl greased with olive oil and cover the bowl with plastic wrap.

Place the dough in a warm spot and rise until doubled in size, approximately 1 ½ hours.

Grease an 8" (20cm) square nonstick pan with olive oil.

Turn the dough out onto a lightly floured surface. Divide the dough into 20g portions. Roll each piece into a ball and place into a bowl.

Add the pesto and gently stir until the balls of dough are completely covered with pesto.

Transfer the balls of dough to the prepared pan, arranging so that they sit in a single layer.

Cover the dough balls with half of the cheese (15g), sprinkling it evenly over the top.

Lightly cover the pan with plastic wrap and leave the dough to rise in a warm spot until almost doubled in size, approximately 30-45 minutes.

Toward the end of the rising process, preheat your oven to 350°f / 180°c.

Sprinkle the monkey bread with the remaining 15g of grated parmesan.

Bake the monkey bread for 20 to 25 minutes, until the bread is baked, springs back when pressed, and the cheese on top is golden brown.

Remove the monkey bread from the oven and leave to cool in the pan for 10 minutes before removing. Sprinkle with flaky sea salt. Serve warm or at room temperature.