Preheat oven to 425˚F / 220˚C.
Place the carrots onto a baking sheet and drizzle with olive oil and season with salt and black pepper. Roast for 20 minutes, until the carrots are partially cooked. Remove from the oven and scatter over the garlic or onion powder and toss to coat.
Reduce heat to 400˚F / 200˚C.
Place the puff pastry onto a sheet of baking paper. Give it a quick roll to make it slightly thinner and bigger. Using a dinner plate as a template, cut out an approximately 10-inch/ 25 cm circle. Leaving a 1/2-inch / 1.25cm border around the edge, lay the brie on top and then arrange the roasted carrots on top of the cheese. Top with the thyme leaves. Season with salt and black pepper and drizzle with olive oil. Roast until the pastry is puffed and golden, about 30 minutes.
Remove from the oven and drizzle over the hot honey or regular honey.
Leave for 5 minutes and then cut and eat.