01 -
Rub together sugars, flour, butter, and lemon zest until the mixture is sandy. Chill until needed.
02 -
In a bowl, mix warm water, sugar, and yeast. Let sit until foamy, about 15 minutes.
03 -
Combine flours, sugar, egg, butter, and the activated yeast mixture. Knead for 15 minutes until smooth. Cover and proof for 75 minutes.
04 -
Heat milk with lemon peel and sugar in a saucepan until just boiling. In a separate bowl, whisk eggs and cornstarch. Gradually temper with hot milk. Return mixture to the pan and cook until thickened, stirring constantly. Strain and chill.
05 -
Divide the dough into 6 equal portions. Roll each into a ball, then flatten the centers to form wells. Proof for another 15 minutes.
06 -
Brush the dough with egg wash. Fill each center with custard, arrange peach slices on top, sprinkle with crumble, and finish with brown sugar.
07 -
Preheat oven to 320°F (160°C). Bake the brioche for approximately 20 minutes, or until golden brown.
08 -
Serve warm with coffee or chilled as a sweet treat.