Preheat the oven to 425°F.
Prep the carrots. Wash the carrots and pat them dry before peeling the skin off. Spread out into a single layer with a little space in between on a lined baking sheet. Brush/rub olive oil over the carrots and season with salt and pepper. Place in the oven for 20 minutes, flip the carrots over to brown the other side and cook for an additional 10-12 minutes or until fork tender.
Make the glaze. Melt the butter and add to a small bowl with the maple syrup, miso, and kosher salt. Whisk together until combined.
Glaze the carrots. Generously brush the glaze over all sides of the carrot and put back in the oven for an additional 3-5 minutes.
Serve warm. Feeds 4-6 people depending on the size of your carrots.