Recipe: Slow Cooker Creamy Pumpkin Spice Oatmeal

Name: Recipe: Slow Cooker Creamy Pumpkin Spice Oatmeal
Ingredients: Cooking spray, olive oil, or coconut oil; 2 tablespoons unsalted butter, divided; 1 1/2 cups steel-cut oats; 1 (15-ounce) can pumpkin purée; 1 teaspoon ground ginger; 1/2 teaspoon ground nutmeg; 1/4 teaspoon ground cloves; 4 cups water; 2 cups whole milk; 1/4 cup maple syrup; 1 (3-inch) cinnamon stick; 1 teaspoon vanilla extract; 1/4 teaspoon salt; For serving: heavy cream, ground cinnamon, and additional maple syrup (optional)