Prepare your slow cooker by cutting three strips of heavy-duty foil and arranging them like spokes in the bottom of the cooker. Spray with cooking spray.
In a large bowl, whisk the eggs, oats, ketchup, and the onion soup mix together until well combined.
Gently crumble the ground beef over the mixture and use your hands to mix everything lightly—don't overwork it.
Shape the mixture into an oval loaf and place it in the center of the foil strips.
Cover and cook on low for 5 to 6 hours, or until a meat thermometer inserted in the center reads 160°F.
Using the foil strips as handles, lift the meatloaf out, let it rest for 10 minutes, then slice and serve.
Notes
Nutrition per serving: Calories: 276, Total Carbs: 11g, Net Carbs: 10g, Fats: 15g, Protein: 23g.