Preheat the oven to 400 degrees, then roughly chop the head of cauliflower into equal-size florets.
Put the cauliflower on a sheet pan and coat with 1 tbsp olive oil, 1 tsp garlic powder, and 1/2 tsp salt.
Place the sheet pan in the oven and cook the cauliflower for 30 minutes or until slightly crispy.
Once the cauliflower is done, put it in the blender along with the rest of the ingredients. Blend until smooth. *** Be sure to leave the blender lid slightly open for steam to escape.