1. Pour the egg into a tall bowl suitable for blending.
2. Blend the egg while adding some olive oil little by little until a firm mayonnaise is ob-tained.
3. Add the cockles and the corresponding amount of liquid.
4. Mix and serve.
Recommendations
You can also use a commercial mayonnaise and replace the cockles with mussels. The sauce can accompany fish, vegetables or pasta. Keep it cold until eating time.