2appleGranny Smith, peeled, cored and roughly chopped
110graw golden sugarplus extra if needed
1lemonzested
50gbuttercold, cubed
Instructions
To make the sauce, place the rhubarb into a medium-sized saucepan along with the apple, sugar, lemon zest and a splash of water. Bring to a gentle simmer, and cook until the rhubarb and apple are both fully cooked and falling apart.
Allow to cool a little, then taste and adjust the flavour if necessary, adding a little more sugar if it is too tart.
Add half the cold cubed butter, and stir in until fully emulsified, then repeat with the other half. Set aside.