Add the dressing ingredients to a small jar with a lid and shake well to combine. Pour the dressing in the bottom of a large salad bowl. Alternatively, add the dressing ingredients directly to the bowl and whisk to combine.
¼ cup extra virgin olive oil, 2 teaspoons Dijon mustard, 1½ Tablespoons red wine vinegar, salt and pepper
Add the cauliflower to the salad bowl and toss well to coat with the dressing.
4 cups cauliflower
Then add the remaining salad ingredients to the bowl.
1 cup cucumber, 1 cup cherry tomatoes, ½ cup Kalamata olives, ¼ cup red onion, ¼ cup fresh parsley
Toss everything together and serve.
Notes
Leftover cauliflower salad can be refrigerated in an airtight container for 2 to 3 days. However, I prefer to eat it on the day it's made when it has the most flavor and crunch. On the following days, you may want to add a little additional Dijon mustard and/or vinegar to refresh it.