Preheat oven to 400F

Pour avocado oil into a frying pan over medium-low heat

Add diced white onion to the pan and cook until soft and fragrant - about 3 minutes

Add 1/2 lb of ground beef to the pan, increase the heat to medium

Break the beef up into crumbles and season with salt and pepper

Continue cooking the beef and breaking up with a spatula until brown and crumbled

Remove the pan from the heat and set aside

Spray a 13x9 baking dish with avocado oil

Crack 12 eggs into the greased baking dish and whisk them together until fluffy

Pour beef and onion mixture into the baking dish with a spoon

Season with salt and pepper

Sprinkle cheddar cheese all over the top of the dish

Bake in the oven at 400F for 30 minutes

Remove from the oven and cut into 12 individual squares