For the best texture, avoid overcooking the cauliflower and make sure it is very well drained and dry before mixing with the dressing, since excess moisture can thin the creamy base. You can blanch the florets in salted boiling water instead of steaming if you prefer, but reduce the cooking time slightly and cool quickly in an ice bath. If you are sensitive to the carbs in onion, reduce the red onion to 1/4 cup and add a pinch of onion powder to keep the flavor without adding many carbs. This salad keeps well in an airtight container in the refrigerator for up to 3 days and often tastes even better the next day as the flavors develop, making it ideal for keto meal prep and easy lunches.