Have a baking sheet or large plate handy—large enough to hold all four burger patties. I recommend covering the surface with parchment paper to prevent sticking.
Place all of the beef patty ingredients into a large bowl. With clean hands, mix and fold the ingredients together until well blended. (You could use a spoon or spatula, but nothing works better at blending than your own hands.)
Once blended, evenly divide the ground mixture into four, and start forming your patties. Place each patty onto the parchment covered baking sheet or plate, and gently press your thumb into the middle of each patty to create a dent. This dent will prevent the patty from shrinking on the grill.
Place the patties in the fridge for at least 30 minutes; you can leave them in there for a few hours if you're really working ahead of schedule.