Preheat and prep: Preheat your oven to 350°F (175°C). Coat a 9x13 inch baking dish with cooking spray. Peel and cut the sweet potatoes into 1.5 inch chunks. Peel and cut the carrots into 1 inch pieces.
Combine vegetables and fruit: Place the sweet potatoes, carrots, prunes, and dried apricots in the prepared baking dish. Toss to distribute evenly.
Make the glaze: In a medium bowl, whisk together the orange juice, water, honey, brown sugar, and cinnamon until well combined.
Pour and cover: Pour the glaze mixture over the vegetables and fruit. Toss gently to coat everything. Cover the baking dish tightly with aluminum foil.
First bake: Bake covered for 1 hour. The vegetables will start to soften and absorb the sweet glaze.
Add butter and finish: Remove the foil and arrange the butter slices evenly over the top. Return to the oven uncovered and bake for 45-60 minutes, stirring carefully every 15 minutes, until the sweet potatoes are fork-tender and the sauce has thickened.
Garnish and serve: Remove from the oven and let rest for 5 minutes. Garnish with fresh orange zest if desired. Serve warm and enjoy!