Add the avocados, Greek yogurt, olive oil, lemon juice, and garlic to a food processor. Add The Holly Tree Organic Mixed Herbs, The Holly Tree Organic Black Pepper Powder, and Salt. Blend until smooth and creamy, scraping down the sides as needed. If a thinner consistency is preferred, add 1–2 tablespoons of water and blend again. Taste and adjust the seasoning if needed. Transfer the dip to a serving bowl and create a gentle swirl on the surface using the back of a spoon. Drizzle with a little extra virgin olive oil and finish with a sprinkle of The Holly Tree Organic Mixed Herbs and chopped parsley.