Avocado Greek Yogurt Ranch Dressing

plain fat free or low-fat Greek yogurt

medium avocado (, peeled and cored)

fresh lime juice

garlic

chopped fresh parsley ((or 2 tsp dried))

chopped fresh dill (, to taste (or 1/2 tsp dried))

chopped fresh chives ((or 3/4 tsp dried))

onion powder

Salt and freshly ground black pepper (, to taste)

Up to 6 Tbsp milk (, as needed (for a slightly richer dressing sub 2 Tbsp olive oil for some of the milk))