Boil cauliflower in salted water until it is soft. Allow it to cool.
Add celery, pickles, eggs, and bacon. Mix well.
Mix the Greek yogurt, mustard, salt, and pepper to make a dressing. Add pickle juice to thin, if needed.
Garnish with green onions and serve cold.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.