Water cress is frequently Infested with insects. Must be checked.
How to check watercress
1. Remove the leaves from the stem.
2. Soak the leaves in a solution of vegetable wash and water. Enough vegetable wash should be used to make the solution feel slippery and sudsy. The solution should be in a vessel that is large enough to fit the product to be checked, and to allow an individual to vigorously agitate the product.
3. Agitate the product in the solution.
4. Remove the product from the solution. Direct a stream of water at each leaf, on both sides, and rub the leaves with your fingers during the process.
5. Grind the leaves.