Step 1. In a 4.5-qt saucepan, heat up the unsalted butter over medium heat. Add 1 cup cubed apples to the saucepan; cook for 3 to 5 minutes or until the apples are lightly caramelized; stir occasionally.
Step 2. Add the old-fashioned oats, salt, ground cinnamon, and ground nutmeg; stir to combine. Add the whole milk; bring the saucepan to a boil over high heat. Lower the stovetop to low heat and allow it to simmer for 7 to 9 minutes covered or until the oats are fully cooked.
Step 3. Stir in the pure pumpkin puru00e9e. Cover and allow it to simmer for 2 to 3 minutes.
Step 4. To serve, stir in the minced ginger; top with the raisins, walnuts, and remaining cubed apples; drizzle with maple syrup.