1. Preheat oven to 450 degrees. Gather garlic and red-pepper flakes into a pile. Using a chefs knife, coarsely chop; season generously with salt. Using flat side of knife blade, mash mixture into a paste.
2. Place paste into a large bowl; add oils, and mix to combine. Add cauliflower, and toss to coat. Spread mixture in a single layer on a large rimmed baking sheet. Roast until cooked through, 20-25 min.
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