combine the dry ingredients in the bowl of a stand mixer. warm the wet ingredients together.
mix the warm milk and butter with some of the flour until it's smooth. Add mashed sweet potato + egg and mix to combine. start adding the remaining flour until a shaggy dough is formed.
knead the dough until it's smooth and springy. form into a smooth ball and transfer to a lightly oiled bowl. cover and let rise.
once the dough has doubled in size, punch it down, let it rise for a few more minutes then form into balls and press into buns.
let the dough balls rise then brush with egg wash and sprinkle with za'atar seasoning. bake until golden brown.
all that's left is to enjoy! I love these with soft salted butter.