Preheat the oven to 425°F. Line a baking sheet with parchment paper and set aside.

Peel and cut the sweet potatoes into bite-sized pieces. Add to a large bowl and season with salt.

In a small saucepan, add the butter and olive oil. Simmer over medium heat until the butter has melted. Add the lemon juice, lemon zest, and honey. Simmer for one minute on low heat.

Pour the honey-lemon butter over the sweet potatoes. Toss well to coat evenly.

Transfer the sweet potatoes onto the baking sheet and roast for 25 minutes. Check for doneness and add additional time if needed.