In a skillet over medium-high heat, add one pound of ground beef and break it apart with a spatula. Sear for about 5–7 minutes until browned. Drain excess fat and season with salt and pepper.

Lay out large flour tortillas. On one half, add a generous layer of shredded cheddar cheese followed by American cheese.

Once the beef is cooked, scatter it over the cheese. Add favorite toppings like jalapeños or pickles. Fold the tortillas over to seal.

In the same skillet, reduce heat to medium and add oil. Cook the folded quesadillas for 3–4 minutes on each side until golden brown and cheese is gooey.

Transfer to a cutting board, cool slightly, then slice into wedges. Serve immediately with lettuce, tomato, and condiments.