You could also decide how thick the beef patty is, depends on how you like it.
There are lots of recipe from books/internet to make beef patty, I usually use this recipe:
3 small Red Onion
2 small Garlic
1/2 of small Onion
All slices and cook them with Olive Oil until half cooked
300 gr Minced Beef - less fat is more juicy
Herbs and spices (Rosemary/Italian Herbs Mix, Black Pepper, Garlic Powder)
Worchestersheir Sauce & BBQ Sauce
Breadcrumbs (instead of using breadcrumbs, I use a Wholegrain bread, toast and then crush them into pieces)
4 Burger Buns
Combine half cooked union/garlic to the beef, add herbs, add 1 Tbs Sauce Worchestersheir & BBQ Sauce, crushed wholegrain bread to the beef and then mixed them all with your hand.
Divide the mixture into 4 equal portions shape each portion with your hands into a patty.
Place the patties onto a tray lined with- greaseproof paper. Cover with plastic wrap and place in the fridge for at least 30 minutes to rest. Chilling the patties will help them hold together when cooked. This also allows the flavours in the patties to blend and develop. If you chill the patties for any longer, increase the cooking time slightly.
Heat half the olive oil in a large, non-stick frying pan over medium-low heat and cook half the patties for about 4 minutes on each side or until browned and cooked through. It is important to cook mince right through because it has a larger ratio of surface area to volume than whole pieces of meat, and is therefore at greater risk of contamination by bacteria in the air. Transfer the patties to a plate, set aside and keep warm. Repeat with the remaining oil and patties.
For the buns, preheat grill on high. Place the hamburger buns, cut-side up, under the preheated grill and toast for 1 minute or until golden.
To Serve, Spread mayonnaise on the buns add beef patty and sauted garlic & mushroom on top of it. You could also add shredded lettuce and tomato first or Cheese before.
Served with side dish, mixed veggies and french fries.