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Heat oven to 425 degrees f
Toss carrots with the oil, salt & pepper.
Arrange evenly on foil or parchment lined large rimmed flat sheet pan. Place fresh rosemary amongst the carrots.
Cover pan tightly with another sheet of foil and bake for 20 minutes.
Remove foil, flip carrots.
Continue to roast, uncovered, an additional 20-30 minutes until lightly browned.
Nutrition information is automatically calculated, so should only be used as an approximation.