Set your oven to 175°C/350°F (155°C/310°F fan-forced). Grease a baking dish 19x26 cm (7.5x10.2 inches) with a little olive oil.
Heat extra virgin olive oil in a pan over medium heat. Add the green bell pepper, red bell pepper, and onion. Sauté for about 5 minutes until softened.
Add the ground meat and cook until browned and fully cooked, breaking it up with a spatula. Remove from heat.
In a large bowl, add the eggs, sour cream, milk, salt, black pepper, onion powder, garlic powder, and Italian seasoning. Whisk until smooth and well combined.
Add the cooked meat, vegetables, and grated cheddar cheese to the bowl and stir to combine.
Pour the mixture into the greased baking dish, spreading it evenly.
Bake for 30-35 minutes or until the eggs are set and the top is golden brown.
Let the casserole cool for a few minutes before slicing and serving.
Notes
Grease the dish: A well-greased dish prevents sticking and makes cleanup much easier.Cook the meat first: Make sure the meat is fully cooked before mixing it with the eggs. Since the casserole bakes quickly, the meat won’t have time to cook in the oven.Whisk it well: Mix the eggs, sour cream, milk, and spices thoroughly so the flavors blend evenly in every bite.Let it rest: After baking, give the casserole a few minutes to cool. This helps it set, making it easier to slice.Customize as you like: Swap cheddar for another cheese, add mushrooms or spinach, or toss in some crispy bacon for extra flavor.