Place the rhubarb in a heat-safe bowl and microwave for 2 minutes or until soft. Add cream cheese, cashew milk, natural sweetener, salt and extract to the bowl and stir well to combine so there are no clumps.
Place into 4 ramekins and smooth the top. Place in the fridge to chill for at least 20 minutes. Just before serving, Divide the crushed nuts over each ramekin and serve.