In the 9x13 inch baking dish, add in the cauliflower florets, onion, tomatoes, zucchini, garlic, olive oil, salt, garlic powder, onion powder, Italian herb blend, pepper and mix together until all is coated. Spread out evenly. Next, add in the Boursin in the middle and drizzle with olive oil. Bake for 35-40 minutes or until golden brown on top and cauliflower is fork tender. Mix it all together and serve immediately.