Preheat oven to 400 degrees F.
In a small bowl, toss cauliflower florets with 2 tablespoons olive oil and 1 teaspoon sea salt.
Create a foil packet by folding a 20-inch length of Reynolds Wrap® Aluminum Foil in half and then folding the sides over several times. Carefully spoon cauliflower into packet and fold top over several times to seal. Set on a rimmed baking sheet and bake 25 to 30 minutes or until cauliflower is fork tender (use caution when opening foil packet – the steam inside will be very hot).
In the bowl of a food processor, pulse to combine roasted cauliflower, labneh, 1/4 cup olive oil, lemon juice, chili oil and garlic and then process 1 minute or until mixture is smooth. Taste and add salt as need.
Spoon spread into a serving bowl. Top with fresh rosemary, remaining 2 tablespoons olive oil, and a squeeze of lemon. Serve with toasted flatbread triangles.