Warmth reserved skillet over medium-high till you’ll be able to see wisps of smoke. Add 1 Tbsp. vegetable oil, then 3 balls of meat, spacing evenly aside. Firmly smash down meat as skinny as attainable with a heavy metallic spatula (you may as well use a barely smaller heavy skillet to crush patties as they prepare dinner); season with salt and pepper. Cook dinner patties, undisturbed, till deeply browned beneath, about 2 minutes. Flip and prepare dinner till cooked by way of, about 1 minute. Switch to a plate. Repeat with remaining balls of meat, including extra oil if skillet seems to be dry.