Line a sieve with clean muslin and pour in the oat mixture.

Leave to drip through for 5 mins, then twist the ends of the muslin and squeeze well to capture as much of the oat milk as possible – it should be the consistency of single cream.

Best chilled at least 1 hr before serving.

Can be kept in a sealed or covered jug in the fridge for up to 3 days.

2)Heat oven to 200C/180C fan/gas 6 and line a baking tray with baking parchment.

Put the orange juice in a medium saucepan and bring to the boil.

Boil rapidly for 5 mins or until the liquid has reduced by half, stirring occasionally. 

Mix the remaining 200g oats with the orange zest and cinnamon.

Remove the pan from the heat and stir the oat mixture into the juice.

Spread over the lined tray in a thin layer and bake for 10-15 mins or until lightly browned and crisp, turning the oats every few mins.

Leave to cool on the tray.