Wash the rhubarb and strawberries. Cut them into small pieces.
Add all the ingredients into a pot and let it boil for 10-15 minutes.
After it is cooled down, sift the mixture so that only the juice is left.
Now put it in the freezer for about 2 hours. After those 2 hours blend it until you get a cream texture. Repeat this step another time.
After that just leave it in the freezer at least for another hour. Now the texture should be like sorbet. Otherwise repeat step 4 or let it in the freezer for a little longer.
Enjoy the sorbet! If wanted with some fresh fruit, nuts or waffles.