This document provides instructions for making lemon squash. It lists the key ingredients as lemon juice, sugar, water, and a preservative like potassium metabisulfite or sodium benzoate. The preparation method involves squeezing lemon juice, dissolving sugar in water by heating to make a syrup, mixing the syrup and juice, adding a preservative, bottling, and storing in the refrigerator. A flow sheet outlines the full process from washing and cutting lemons to extracting juice to mixing and bottling the final product. The document concludes that making lemon squash at home is beneficial based on its benefit-cost ratio.