In a small bowl, whisk together the milk, butter, and egg yolks. In a larger bowl, combine the flour, yeast, salt and sugar.
Pour the wet ingredients into the flour mix and stir to combine with a spoon. Mix until you form a firm dough.
Turn the dough onto a lightly floured surface, and knead until the dough comes together to form a soft, slightly sticky dough. (If it’s too sticky, add a tbsp or two of extra flour, if it’s too dry, add milk - a teaspoon at a time).
Coat the dough with a little oil and place it in a well oiled large bowl (with enough room for the dough to rise). Cover with plastic wrap and leave to rest for 1 hour at room temperature.
Transfer to the fridge and leave it to rise for 24 hours.
Turn it out onto a floured surface and roll it out into a rectangle. Cut it into 20 equal portions.
Take each portion and lightly knead and roll it into smooth balls in the palm of your hands. If the dough ball is sticky, use lightly floured hands. Place each dough ball on a tray, lined with parchment paper, leaving about 1.5 inches between each.
Spray the dough balls with non stick spray and cover with plastic wrap and keep them in the warmest part of your home for 1 hour or until it doubles in size.
Preheat the oven to 350°F/180°C.
Before baking, brush the tops of the buns with the egg glaze, and sprinkle the sesame seeds on top (optional).
Bake in the preheated oven for 20-25 minutes or until the buns turn golden brown.
Remove from the oven and let them cool for 10 minutes.
Miso and Mango Lamb Sliders
Heat 1 tbsp of oil in a non stick pan over high heat. When the oil is hot, add the leftover meat and cayenne pepper, mix well, and leave for a few seconds to reheat and caramelize the meat slightly. Then remove immediately, to prevent overcooking.
For grilled green onions, cut off the roots and clean them and then place them on the same non stick pan or a grill pan till you see some caramelization (optional). Remove from the heat and chop them up.
Cut the burger buns in half and spread white miso paste on the bottom slider bun, then place the meat, kewpie, chopped green onions, a few mango slices and then drizzle some honey on the mango slices. Place the other slider bun on top and insert a toothpick through the middle to hold everything in place.