In a small saucepan, combine the rolled oats, almond milk, pumpkin puree, pumpkin pie spice, cinnamon, and a pinch of salt. Stir well to ensure the pumpkin puree is fully integrated into the liquid.
Place the saucepan over medium heat. Bring the mixture to a gentle simmer, stirring frequently to prevent the oats from sticking to the bottom. Continue cooking for about 5 to 8 minutes, or until the oats have absorbed most of the liquid and reached your desired thickness.
Once the oatmeal is thick and creamy, remove the pan from the heat. Stir in the vanilla extract and your choice of sweetener if you prefer a sweeter taste. Let the oatmeal sit for about one minute; this prevents the protein powder from clumping or becoming grainy when added.
Add the scoop of vanilla protein powder to the saucepan. Stir vigorously until the powder is completely dissolved and the oatmeal is smooth. If the mixture becomes too thick, you can add a splash of extra milk to reach your preferred consistency.
Transfer the oatmeal to a bowl and add your favorite toppings. Serve immediately while warm and fragrant.