Place prepared ingredients and walnuts in blender or food processor container and process until a textured paste is achieved, adding lemon juice or vinegar gradually while processing. Add salt to taste, place in a bowl and chill until required.

If you have no processor or blender, pass ingredients through food grinder with fine screen, or chop ingredients finely, then pound with a pestle in a mortar. Gradually stir in lemon juice or vinegar and add salt to taste.