Gently combine beef and seasoning. Form into two round patties. Make an indention in the middle to keep patty from rounding while cooking.
Heat 2 Tbsp oil in a cast iron skillet over medium high heat. Once hot, carefully lay patties on hot pan. Do not flip for 4 minutes to create a delicious brown sear. After 4 minutes, flip the patties and do not flip again for 4 minutes. After 8 minutes, cook to your desired level of doneness.
Layer all ingredients on buns. Start with mustard and relish, add patty, and top with tomato and onion. Use a long toothpick or skewer to secure pickle and sport pepper to the top.