Preheat oven to 350°. Drain peaches, reserving 2 tablespoons juice. Cut peach slices lengthwise in half; pat dry., In a small bowl, mix brown sugar, 1 tablespoon melted butter, spices and reserved juice; spread into a 9-in. round baking pan coated with cooking spray. Arrange peach slices over top., In a large bowl, whisk together flour, sugar, baking powder, baking soda and salt. In another bowl, whisk together egg, vanilla, buttermilk and remaining butter. Add to dry ingredients; stir just until moistened. Spoon over peaches., Bake until a toothpick inserted in center comes out clean, 30-35 minutes. Cool 10 minutes before inverting onto a serving plate. Serve warm.