Start by making salad dressing.
In small mixing bowl combine olive oil, apple cider vinegar, dijon mustard, oregano, basil, garlic, salt & pepper and whisk together well. Set aside.
Meanwhile bring large pot of lightly salted water to a boil.
Break the cauliflower into small bite sized florets and when water comes to boil carefully add cauliflower.
Cook about 7 minutes. Drain and rinse with cold water to stop cooking.
Place drained cauliflower in large salad bowl
Add chopped cucumber, black olives, grape tomatoes, red onion, feta cheese, prepared salad dressing and mix well.
Cover and store in fridge for up to five days.