01 -
Preheat oven to 175°C. Lightly coat a standard loaf pan with non-stick spray and set aside.
02 -
Finely dice enough fresh rhubarb to yield 2 cups. Reserve for folding into batter.
03 -
In a large mixing bowl, whisk together egg, buttermilk, oil, sugar, and vanilla extract until homogeneous.
04 -
Whisk in baking powder and salt, ensuring even distribution throughout the mixture.
05 -
Fold in plain flour gently until batter is just combined, avoiding overmixing.
06 -
Gently fold diced rhubarb into the batter, distributing evenly.
07 -
Pour batter into prepared loaf pan. Evenly sprinkle 1 tablespoon of sugar over the surface.
08 -
Bake for 60–65 minutes, or until a skewer inserted into the centre emerges clean.
09 -
Allow loaf to cool in the pan for 15 minutes before transferring to a wire rack to cool completely.