- 100g/3½oz butter
- 100g/3½oz caster sugar
- 2 free-range eggs
- 100g/3½oz self-raising flour
- butter, for greasing
- 150g/5oz rhubarb, peeled and chopped
- 1 large lemon, peeled and chopped
- 2 tbsp honey
- Preheat the oven to 200C/400F/Gas 6.
- Place the butter and sugar into a food processor and blend together to a paste.
- Add the eggs and flour and blend again.
- Grease a baking tray with butter and add the rhubarb and lemon pieces and drizzle with the honey.
- Add the sponge mixture to the tray and place in the oven to bake for ten minutes, or until the sponge is golden and set firm.