Place cauliflower and garlic on a baking sheet and drizzle with 1 tablespoon olive oil, salt and pepper. Roast for 35-40 minutes, tossing midway, until cauliflower is slightly browned and garlic is soft.
In a food processor, combine roasted cauliflower and garlic, tahini, and lemon juice. Pulse in food processor until smooth. Turn on the food processor and slowly add ¼ cup olive oil until it is fully incorporated.
Transfer hummus to a serving bowl and top hummus with olive oil and paprika if desired. Serve with any of your favorite low carb vegetables or keto crackers.