Place olive oil in the base of the slow cooker.
In small bowl, whisk the egg. In another small bowl, combine the bread crumbs, Parmesan cheese (omit if dairy free!), Italian seasonings and salt and pepper.
Dip each chicken breast into the egg, then coat with the bread crumbs mixture. Then place into the bottom of the slow cooker. Top with handful of shredded mozzarella cheese. Pour marinara sauce over the top.
Cook in the slow cooker on low for 6-7 hours, or on high for 3-4 hours.
Just before dinner, prepare your favorite pasta according to package instructions. I choose whole wheat spaghetti noodles.
Cook frozen spinach as directed on package.
Serve Slow Cooker Chicken Parmesan over Pasta with Spinach.