In a small bowl, whisk together mayonnaise, Greek yogurt (or sour cream), Cajun seasoning, red pepper flakes, salt, and pepper until well combined.
Place cauliflower florets, diced hard-boiled eggs, grated cheddar cheese, and crumbled bacon in a large bowl.
Pour the dressing over the cauliflower mixture and toss gently until everything is evenly coated.
Place the serving bowl in the refrigerator for at least 15-20 minutes, or overnight, to allow the flavors to meld together.
Serve chilled and enjoy the irresistible combination of flavors and textures in this Cauliflower Bacon Egg Salad.