In a large skillet, over medium to medium-high heat, add onions and ground meat. Using a wooden spoon, break the beef into small pieces.
Cook ground beef until no longer pink and onions are tender.
Drain and put mixture in a large mixing bowl.
Add potatoes, Taco seasoning and pepper.
Stir until blended together.
Spray slow cooker with cooking spray.
Add meat mixture to slow cooker.
In a medium bowl, using your whisk, blend eggs and cheese soup together until smooth.
Pour over top of beef mixture. Stir until incorporated.
Cover and cook on high for about 2 hours. Serve and enjoy!