Combine in a small bowl, the yogurt, mayonnaise, lemon juice, mustard, minced garlic, salt, and parmesan cheese. Whisk until smooth.
⅓ cup Plain Greek Yogurt, 2 tbsp Mayonnaise, 2 tbsp Lemon Juice, 1 clove Garlic, ½ tsp Salt, ¼ cup Grated Parmesan Cheese, 1 tsp Dijon Mustard