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

In a large bowl, combine rhubarb and sugar. Add oil, egg, and vanilla, mixing well before letting it sit for 5 minutes.

In a separate bowl, whisk flour, baking soda, and salt until well combined.

Fold the dry ingredients into the wet mixture without overmixing, add nuts if desired.

Pour the batter into the prepared loaf pan and bake for 55-60 minutes until a toothpick comes out clean.

Cool the bread in the pan for 30 minutes, then transfer to a wire rack to cool completely.