Lightly spray slow cooker with nonstick spray.
Add all dry ingredients (oats, optional collagen peptides, chia seeds, cinnamon, nutmeg, and salt) to slow cooker. Stir to combine.
Add all wet/sticky ingredients (carrots, water, vanilla, maple syrup, and optional raisins) to slow cooker. Stir to combine. For creamer oats, you can use milk instead of water as your liquid.
Cook on low for 3-5 hours or until liquid is fully absorbed.*
Garnish with optional toppings of choice (chopped nuts, nut butter, Greek yogurt, chia seeds, etc.)
For a thinner oatmeal, stir in additional water or milk of choice.
Store in the fridge for up 3-5 days. To reheat, simply microwave for 30-60 seconds, or until it reaches your temperature of choice. Add additional water or milk until it reaches your preferred consistency.