Heat a large skillet over medium heat and add 1 tablespoon of vegetable oil. Once the oil is shimmering, add the ground beef and break it into small pieces using a wooden spoon. Cook for 6-8 minutes, or until the beef is browned and fully cooked. Drain any excess fat.
Stir in 1/2 cup of finely chopped white onion, 2 teaspoons of garlic powder, 1 teaspoon of paprika, 1 teaspoon of salt, and 1/2 teaspoon of black pepper. Cook for an additional 2 minutes, allowing the flavors to meld. Remove from heat and set aside.
In a small bowl, combine the shredded lettuce, diced pickles, shredded cheddar cheese, and diced tomato. Toss gently to mix.
Divide the ground beef mixture evenly among 4 serving bowls. Top each bowl with the lettuce, pickle, cheese, and tomato mixture. Sprinkle 1/4 cup of finely chopped onion on top of each bowl for garnish.
Drizzle 1 tablespoon of Big Mac sauce over each bowl just before serving. Serve immediately and enjoy!