In a small bowl, mash the avocado until smooth. Add Greek yogurt, olive oil, lemon or lime juice, Dijon mustard, cilantro, salt, and pepper. Mix until creamy and fully combined.
1 avocado, 1-2 tbsp Greek yogurt, 1 tbsp olive oil, 1 tbsp lemon juice, 1 tsp Dijon mustard, 1 tbsp cilantro, ⅛ tsp salt, 1 pinch pepper