Preheat your oven to 400°F (200°C). Heat a large skillet over medium heat, add ground beef and chopped onion. Cook for 6-8 minutes until beef is browned and onions are translucent.

Add salt, black pepper, garlic powder, and Worcestershire sauce to the beef mixture. Stir for about 2 minutes and set aside to cool.

Grease a 9-inch pie dish. Layer the seasoned beef mixture in the dish followed by shredded cheddar cheese.

Whisk together eggs, milk, and flour in a bowl until smooth. Pour the batter evenly over the beef and cheese layers.

Bake in the preheated oven for 25-30 minutes, or until the top is golden and the center is set.

Cool for 10 minutes, slice into wedges and serve warm.