01 -
Preheat oven to 200°C. Lightly grease a 23-centimetre glass pie plate with vegetable oil.
02 -
In a large skillet, heat a small amount of oil over medium heat. Sauté chopped onion until soft, about 3 minutes.
03 -
Add ground beef to skillet. Cook, breaking apart with a spatula, until browned, about 10 minutes. Drain excess fat.
04 -
Season beef and onion mixture with salt, ground black pepper, and, if desired, garlic powder.
05 -
Transfer seasoned beef and onion mixture evenly into prepared pie plate. Sprinkle grated Cheddar cheese over the meat.
06 -
In a bowl, whisk together Bisquick mix or flour, whole milk, and eggs until fully combined.
07 -
Pour batter evenly over meat and cheese layers in the pie plate. Bake for 20 to 25 minutes, or until a knife inserted in the centre emerges clean.
08 -
Let cool slightly, then slice and serve warm.