Preheat oven to 450 degrees Fahrenheit.
Drizzle cauliflower with olive oil and roast in a baking dish for 25 to 30 minutes until golden brown.
In the meantime, whisk all of the sauce ingredients and add water until you achieve a creamy consistency.
Remove cauliflower once cooked and drizzle with tahini sauce. Serve with more sauce on the side.
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