01 -
Set the oven to 400°F. Grease a 9-inch pie dish.
02 -
Sauté onion in a skillet for about 3 minutes. Add ground beef and cook until browned. Drain excess fat and season with salt, black pepper, and garlic powder.
03 -
Spread the cooked beef mixture evenly in the pie dish. Sprinkle the top with shredded cheddar cheese.
04 -
Whisk together Bisquick (or the flour mixture), whole milk, and eggs in a bowl until smooth. Pour the batter evenly over the beef and cheese in the pie dish.
05 -
Bake the pie uncovered in the preheated oven for 20–25 minutes until the top is golden and the center is set.
06 -
Allow the pie to rest for 5 minutes before slicing. Serve warm with a side of salad, pickles, or ketchup.