Preheat your oven to 400°F (200°C) and grease your pie dish.

In a large skillet, brown the ground beef and diced onion over medium-high heat for about 5-7 minutes.

Stir in salt, black pepper, garlic powder, and Worcestershire sauce; let simmer for 2-3 minutes.

Transfer the beef mixture into the greased pie dish and sprinkle cheddar cheese on top.

In a mixing bowl, whisk together the eggs, milk, and flour until smooth, then pour over the beef and cheese layers.

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

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