Pierce the skin of the sweet potato all over with a fork. Place the sweet potato on a paper towel and microwave it for 5 minutes, until fork-tender (alternatively, you can steam or roast it). If the potato is not fully cooked, continue to microwave it in 1 minute increments until it can be easily pierced in the center with a fork.
Allow the sweet potato to cool before handling (you can place it in the fridge or freezer to speed up this process). After a few minutes, peel the potato and place it into a bowl, discarding the skin.
With a hand mixer or fork, beat the potato with the cinnamon (omit for a savory bowl) and salt until smooth and fluffy. Thin the mixture with the milk until the desired consistency is reached.
At this point, add protein powder and maple syrup, if using, for a sweet bowl.
For a savory bowl, omit the cinnamon, protein powder, and maple syrup. Mix in a pinch of pepper and continue to add any toppings.
Transfer the sweet potato mixture to a serving bowl, garnish with fruit, nut butter, and any other toppings, then enjoy!