Collect all the required ingredients in required amount.
Prepare the fresh rhubarb, wash them and then chop them into ½ inch pieces.
Cook the rhubarb with water and sugar in a saucepan over medium temperature.
After becoming soft and sugar dissolve properly, blend them to create a smooth sauce like mixture using a hand blender.
Stir with some cornstarch slurry to thicken the sauce.
Simmer for 2 to 5 minutes to get desire consistency.
Add a little lemon juice to intensify the tart and vanilla essence for satisfying flavors.
Cool the sauce at room temperature.
The rhubarb sauce is ready to serve.
