Add the ground meat, onion powder, egg, parmesan, and garlic to a large bowl. Using clean hands, mix all the ingredients together until well incorporated, about 1 minute.
Divide the meat mixture into 4 equal-size portions (or 8 mini portions), and using your hands, flatten into patties.
This step here is very important: make sure you make a little indent with your fingers in the center of each patty. This is key because the meat will shrink and this will ensure the burger cooks evenly all throughout.
Fire up the gril or a skilletl, and cook for 7-9 minutes on each side depending on your preferred doneness.
Note: If you want to make these on the stove, lightly grease a skillet before cooking the patties on medium-high heat. Your burgers may take more or less time depending on the shape and size of the patties. The best way to test for doneness is to use a meat thermometer.
Assemble onto a burger bun with your favorite toppings and enjoy!
Notes
Meat: You can use any kind of ground meat here: turkey, beef, pork, chicken, veal, etc. I like to use a mixture of 1/2 grass-fed beef and 1/2 pork for the ultimate juiciness.
Cheese: You can use any kind of cheese to make the best gourmet cheeseburgers: blue cheese, feta, mozzarella, cheddar, asiago...it's your world!
Spices: I used fresh garlic and onion powder here, but you could add any spices you love. Or keep it simple with salt and pepper.
Gluten-free: If you're gluten-free, you could make a lettuce wrap instead. I like green leaf lettuce because it has large, sturdy leaves-perfect for wrapping around patties.
Condiments: Instead of the classic mayo, mustard , ketchup trio, try making a homemade aioli or Big Mac sauce.