Bring 1 cup of water or reconstituted milk to a boil in a small saucepan.

Stir in the rolled oats and salt, then reduce heat to medium-low.

Simmer the oats for 5 to 7 minutes, stirring occasionally, until the liquid is mostly absorbed.

Remove the saucepan from the heat source to prevent the protein powder from clumping or graining.

Whisk in the protein powder and peanut butter powder until the mixture is smooth and fully incorporated.

Stir in the chia seeds, hemp hearts, and cinnamon.

Allow the oatmeal to rest for 2 minutes to let the seeds hydrate and thicken the texture before serving.