In a skillet, cook the ground beef with chopped onion until the meat is browned and onion is translucent.

Season the beef mixture with salt, pepper, garlic salt, and chili powder. Set aside.

In a mixing bowl, combine masa harina, baking powder, and salt. Add water and mix with your hands until you form a consistent dough.

Fold in the crumbled fried bacon and longhorn cheese until evenly distributed throughout the dough.

Pinch off portions of dough and roll into 2-inch balls, then flatten to about 1/2 inch thick and 3 inches in diameter.

Heat oil in a skillet and fry the masa discs until golden brown on both sides, turning once during cooking.

Drain the fried gorditas on paper towels, then make a slit through the middle of each one to create a pocket.

Stuff each gordita with the seasoned beef mixture, then top with shredded lettuce, diced tomatoes, and shredded cheese.