Make creamy dill sauce by combining yogurt, mayo, garlic, onion, dill, black pepper, salt, dijon mustard, and vinegar. Adjust seasonings to taste.
⅓ cup avocado oil mayo, ⅓ cup plain yogurt, ¼ tsp garlic powder, ¼ tsp onion powder, ¼ tsp dried dill, ¼ tsp black pepper, ¼ tsp salt, ½ tsp vinegar, 4 tsp dijon mustard