In a medium saucepan, add chopped rhubarb, sugar, lemon juice, sea salt, and strips of lemon peel. Stir.
Turn the heat to medium low and slowly simmer the sauce until rhubarb is softened and the sauce is thick, about 8-10 minutes. Stir often to prevent burning.
Once thick, remove the lemon peels. Allow the sauce to cool.
Place rhubarb sauce in an airtight container in the refrigerator.
Serve rhubarb sauce over ice cream, pancakes, or yogurt. Or enjoy by the spoonful!
Notes
Note 1: Frozen rhubarb can also be used. Additional cooking time may be needed to get rid of any excess moisture. Note 2: Use a potato peeler to remove only the yellow part of the lemon rind. Avoid the white pith of the lemon. It is bitter and unappetizing.