Preheat your oven to 160°C (320°F) or 140°C (285°F) if using a fan. Line a baking tray with baking paper. Optionally, toast the coriander, cumin, and fennel seeds in a dry pan over medium heat until fragrant and golden, then allow them to cool. Using a pestle and mortar, crush the coriander, cumin, and fennel seeds with a pinch of chili (if using) and 1/4 teaspoon flaky sea salt until coarsely ground. Coarsely chop the hazelnuts, leaving some larger pieces for texture. In a bowl, combine the chopped hazelnuts, sesame seeds, and the crushed spice mixture. Mix in 2 tablespoons maple syrup (or date syrup) and 2 teaspoons olive oil until thoroughly coated. Spread the mixture out on the prepared tray in a solid slab. Bake for 10-12 minutes until golden. Allow it to cool completely on the tray, as it crisps up while cooling.
Increase the oven temperature to 220°C (430°F) or 200°C (390°F) if using a fan, and line a large baking tray with baking paper. Wash and dry the carrots thoroughly, then trim the ends as needed. In a large bowl, toss the carrots with 4 teaspoons olive oil, 1/2 teaspoon flaky salt, 1/8 teaspoon ground black pepper (or more to taste), and the leaves from 5 sprigs of fresh thyme. Arrange the carrots in a single layer on the baking tray. Roast for about 20 minutes, until the thickest part of the carrots can be easily pierced with a paring knife. Remove any carrots that are already tender and roast the remaining ones for an extra 5 minutes if necessary. I always try to use carrots of similar size for even roasting, and if I want extra color, I crank up the heat for the last few minutes.
While the carrots are roasting, mix together the pomegranate molasses and 1 tablespoon maple syrup (or date syrup) in a small bowl. When the carrots are tender and golden, remove them from the oven and coat them thoroughly in the pomegranate-maple glaze. Return the glazed carrots to the oven for another 5-7 minutes, until they are sticky and caramelized. For extra flavor, I like to save a little glaze and brush the carrots again after four minutes, returning them to the oven for a few more minutes until beautifully glossy.
Arrange the glazed roasted carrots on a serving platter. Break the cooled dukkah brittle (from Step 1) into rough pieces and scatter generously over the carrots. Finish with a sprinkle of pomegranate arils and extra fresh thyme leaves for garnish. Serve immediately to enjoy the contrast between sticky, sweet carrots and the crunchy, spiced brittle.