Preheat the oven to 350F, and grease a 9x13 casserole dish.
In a large bowl, mix together rolled oats, protein powder, chia seeds, baking powder, cinnamon, and salt.
In a blender or food processor, mix together 2 cooked beets, 3 cups of milk, vanilla, avocado oil, and eggs (or egg substitute). Blend until fully puréed.
Mix together wet and dry ingredients thoroughly, then pour into the casserole dish.
Top with sugar-free chocolate chips to taste.
Bake for 35 minutes, and allow to cool. Top as desired and serve!