Food Truck Smash Beef Egg Tacos

Whisk the egg yolks in a small bowl. Gently melt the butter until warm but not boiling. Slowly drizzle the melted butter into the egg yolks while whisking vigorously to create a thick, creamy emulsion. Whisk in the sea salt and set aside.

Divide the ground beef into four equal balls. Heat a large cast-iron griddle over high heat and melt the beef tallow. Place the beef balls onto the hot griddle and use a heavy spatula to press them completely flat. Season generously with salt. Cook for 2 to 3 minutes until the edges are dark brown and crispy, then flip and sear the other side for 1 minute. Set the beef patties aside.

Reduce the griddle heat to medium. Sprinkle the shredded cheddar cheese in two flat, taco-sized circles directly onto the griddle. Whisk the four eggs with a half teaspoon of salt, then pour the egg mixture evenly over the melting cheese circles. Let the eggs set and the cheese form a golden, crispy crust, about 3 minutes. Carefully flip the egg-cheese wraps and cook for another 30 seconds.

Lay the warm egg-cheese wraps flat, place two crispy smash patties inside each, fold them like tacos, and drizzle generously with the rich street sauce.