Sweet Potato Marshmallow Cinnamon Rolls

Ingredients

• 1/3 cup milk
• 2 tablespoons unsalted butter
• 1 (0.25oz) package (7g) or 2 1/4 teaspoons Red Star Active Dry Yeast
• 1/4 cup mashed sweet potato
• 1 large egg
• 2 cups unbleached all-purpose flour
• 1/4 cup granulated sugar
• 1 1/2 teaspoon ground cinnamon
• 1/2 teaspoon ground nutmeg
• 1/2 teaspoon table salt
• 2 tablespoons unsalted butter (melted)
• 1/4 cup brown sugar
• 2 teaspoons ground cinnamon
• 1 cup mini marshmallows
• 3/4 cup powdered sugar
• 1/2 teaspoon vanilla
• Pinch of salt
• 1 1/2 tablespoons unsalted butter
• 1/4 cup water