In a 16-ounce glass jar or airtight container, combine the rolled oats, chocolate protein powder, cocoa powder, chia seeds, and monk fruit sweetener.
Whisk the dry ingredients until evenly distributed to prevent protein powder clumping.
Pour the unsweetened almond milk into the jar and stir vigorously until no dry pockets remain.
Gently fold in the diced strawberries and sugar-free dark chocolate chips.
Secure the lid on the container and refrigerate for a minimum of 6 hours, or overnight, to allow for full hydration of the oats and chia seeds.
Stir the mixture once more before consuming to redistribute the moisture. Top with additional fresh strawberries if desired.