Preheat your oven to 350°F (175°C) and grease a standard loaf pan.

In a large bowl, combine all-purpose flour, granulated sugar, and baking powder.

Whisk together eggs, olive oil, and lemon zest in a separate bowl, then fold in diced rhubarb.

Combine the wet and dry mixtures until just mixed, being careful not to overmix.

Pour the batter into the prepared loaf pan and spread evenly.

Bake for 50 to 60 minutes until golden brown and a toothpick comes out clean.

Let the loaf cool in the pan for 10-15 minutes, then transfer to a wire rack.