Preheat your oven to 425°F (220°C).
Peel your sweet potatoes and cut each one into 4 even slices.
In a mixing bowl, toss the potato slices with melted butter and salt until evenly coated.
Arrange the slices on a baking tray and bake for 15 minutes. Flip them over and bake for another 10 minutes.
Take the tray out, and switch your oven to the grill/broil setting.
Drizzle maple syrup over the sweet potato slices.
Cut marshmallows in half and place one half on each slice.
Pop the tray back under the broiler for 2–3 minutes, keeping a close eye so the marshmallows don’t burn (they toast quickly!).
Once golden and gooey, remove from oven and gently press a pecan half on top of each marshmallow.
Serve warm and enjoy every sticky, crunchy, sweet bite!