Indoor Burger: Follow the steps above, but instead, heat 1/2 tbsp avocado oil in a cast iron skillet on medium-high heat until hot. Once the cast iron skillet is hot, season the beef patties and place in the skillet. Allow a crust to form on bottom, about 3-4 minutes. Once the patty can release without sticking, flip for another 3-4 minutes until the internal temperature reaches 145 degrees for medium. Pile with favorite toppings and enjoy!