Preheat Oven:
Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish.

Cook Turkey and Veggies:
In a skillet over medium heat, cook ground turkey with diced onion and bell peppers until turkey is fully cooked and veggies are tender. Drain any excess fat.

Mix Eggs and Seasonings:
In a large bowl, whisk together eggs, milk, garlic powder, onion powder, salt, and pepper.

Assemble Casserole:
Spread thawed hash browns evenly in the baking dish. Layer cooked turkey and veggies over hash browns. Pour egg mixture evenly over the top. Sprinkle shredded cheddar cheese over everything.

Bake:
Bake uncovered for 40–45 minutes or until eggs are set and cheese is bubbly and golden.

Serve:
Let cool slightly before slicing. Perfect for a hearty breakfast or brunch!