3/4 c. mayonnaise
1/2 c. milk
2 tbsp. cider vinegar
1 clove garlic, minced (OR 1/4 tsp. garlic powder)
1/2 tsp. dried oregano leaves (OR 1/8 tsp. ground oregano)
1/2 tsp. sugar OR honey
1/4 tsp. salt
1/8 tsp. pepper

Gradually add milk to mayonnaise. Add other ingredients.