sentence: mix some milk olive oil in a cup and blend them using a blender sentence: add a little salt ground pepper lemon juice and chopped parsley sentence: add sour cream and mix it using a spoon sentence: add some crushed walnuts to the mixture and whisk sentence: dice an apple into small cubes and add some green grapes to it sentence: add black grapes and chopped celery sentence: mix the fruits well and pour the sauce in it sentence: toss the fruits and put the salad on fresh lettuce and serve with fresh apple and walnuts