Preheat the oven to 400°F/200°C, and line a large baking tray with a silicone liner or parchment paper.

Toss the cauliflower florets with 1 tablespoon of the olive oil and a pinch of the salt, and lay out on the prepared baking tray.

Roast the cauliflower for about 30 minutes, turning occasionally, until the cauliflower is tender and starting to brown.

Transfer the roasted cauliflower, the remaining olive oil and salt, and the other ingredients to your KitchenAid High Performance blender in the order listed. Secure the lid, remove the center lid cap, and insert the tamper. Blend on high for 30 to 60 seconds using the tamper to guide the ingredients through the blades until well combined and to your desired consistency. (You may need to stop the machine and scrape down the sides of the container.)

Transfer the hummus to a bowl, drizzle with olive oil, and garnish with the chopped parsley. Serve with raw vegetables, chips, or pita bread.