Brown sugar sweet potatoes are the fall side dish that always disappears at my house. You make them in a skillet with a glossy brown-sugar glaze that clings; no oven space is required. They are perfect for holiday cooking, but truth be told, I make them on random weeknights too.
Melt 2 tablespoons of the butter in a large skillet over medium heat.
Add the potatoes and stir to coat. Cover and cook for 15 minutes, stirring every 5 minutes.
While the potatoes cook, make the glaze. In a small saucepan, whisk the cornstarch into the brown sugar while they're still dry — this disperses the cornstarch so it can't clump. Add the remaining 4 tablespoons of butter, the honey, water, cinnamon, nutmeg, and salt. Cook over medium, stirring, until everything melts together, turns glossy, and slightly thickens, about 3–5 minutes.
Remove the lid from the skillet, and pour the brown sugar mixture over the potatoes. Cook for another 10 minutes, or until the potatoes are tender and the glaze is thick. You want it clinging and glossy. Taste for salt and serve warm..