Preheat your oven to 400°F (200°C) and prepare a 9-inch pie dish by greasing it.

In a large skillet over medium heat, add the ground beef and diced onion. Cook until browned, about 7-10 minutes.

Season the meat mixture with salt, pepper, garlic powder, and Worcestershire sauce, then cook for 2 additional minutes.

Spread the seasoned meat mixture evenly in the greased pie dish.

Sprinkle shredded cheddar cheese over the meat layer, covering it completely.

In a mixing bowl, whisk together the eggs, milk, and flour until smooth. Pour this batter over the layers in the pie dish.

Bake the pie in the preheated oven for 25-30 minutes until the top is golden brown and set.

Let the pie cool slightly for 10 minutes before slicing and serving.