Spray the bowl of your slow cooker with cooking spray, or wipe it really well with avocado oil.
Heat 1 Tablespoon of oil in a large skillet over medium-high heat.
Add chopped veggies and sauté until softened a bit, about 4-5 minutes, then transfer them to your slow cooker.
Meanwhile, in a mixing bowl, whisk eggs, Parmesan cheese, dried oregano, milk, and a pinch of sea salt and pepper.
Pour egg mixture into slow cooker and give it a gentle stir.
Cook on HIGH for 1-2 hours or on LOW 3-4, or until eggs are set in the center.
Enjoy!