Combine flour, yeast, and sugar in a mixing bowl.

Chop butter into small pieces and add to the dry ingredients.

Pour lukewarm, strong-brewed green tea over the mixture.

Squeeze tea bags to extract all liquid into the dough.

Mix until a sticky dough forms.

Turn dough out onto a floured surface.

Knead for 10 minutes, adding flour as needed to prevent sticking.

Place the dough back in the mixing bowl and cover with cling film.

Let rise for 2 hours, or at least 30 minutes if short on time.

Remove the dough from the bowl and shape it into a loaf.

Place the loaf in a greased loaf tin.

Use scissors to make small cuts on top of the dough, creating a hedgehog-like appearance.

Cover and let rest for 30 minutes in the tin.

Preheat oven to 180C (350F).

Brush the top of the loaf with milk.

Sprinkle nigella and sesame seeds evenly over the milk-brushed surface.

Bake for 25-30 minutes, or until golden brown.

Let cool slightly before slicing and serving.