Start by fashioning a taco shell mold from aluminum foil. Roll out a piece of foil and fold it over every 10 inches until you have a thick square. Fold this square in half, crimp the edges to create a shape, and form it into a hollow, narrow tube. This mold will help shape your tortillas into the perfect taco shell!

Fire up your oven to 250 degrees F. This low heat will keep your taco shells warm while you prepare the filling.

In a 12-inch cast iron skillet, heat the peanut oil over medium heat until it reaches 350 degrees F. You can check this using a deep-fry thermometer. This step is essential for getting those nice, crispy tortilla shells.

Take one tortilla and mold it around your aluminum foil mold to create that taco shape. With tongs, hold the tortilla against the mold and gently place the bottom half into the hot oil. Let it fry for 20 seconds, then lower one side into the oil for 30 seconds. Flip it over and fry for an additional 30 seconds until golden brown. Once done, place your taco shell on a cooling rack over a newspaper-lined half-sheet pan and cool for 30 seconds before gently removing the mold. Don't forget to sprinkle a pinch of kosher salt on top!

Repeat the frying process for the remaining tortillas, keeping them warm in the oven while you prepare the beef filling.

Drain excess oil from the skillet, keeping just 2 tablespoons in. Return the skillet to medium heat and add the chopped onion. Cook until it's softened and lightly browned. Then, add in your ground beef, garlic, and a teaspoon of salt. Stir to break up the meat while it cooks, about 3-4 minutes until browned.

Stir in your taco seasoning mix and the beef broth. Let the mixture simmer uncovered for 2-3 minutes until slightly thickened. This ensures the beef is packed with flavor and loaded with spices.

Now comes the fun part! Fill each crispy taco shell with the hearty beef mixture. Top with feta cheese, pickled jalapeños, shredded lettuce, fresh tomatoes, and cilantro. Serve those beauties immediately and watch them disappear!