The texture of the creamy avocado sauce  is likely to be chunkier when making this recipe without a blender, but it will still taste great.  The best way for making the sauce without a blender is starting with mashing the avocado well using a masher or fork.  Chop the cilantro, parsley and onion into very fine pieces and mix into the avocado along with the lime juice, olive oil and red wine vinegar.