Separate ground beef into 4 equal parts (4 ounces each); form each part into 4 thin half moon shape patties. Try to shape each patty to fill half of a tortilla.
Heat a 10-inch non-stick skillet (or use a square, deep walled non-stick electric skillet) over medium high heat.
Season each hamburger patty with salt and pepper and cook for 3 minutes a side or to desired temperature.
Near the end of desired cooking time, evenly sprinkle each patty with 1/4 cup cheddar cheese and allow the cheese to melt. Remove cheeseburgers and reserve hot.
Warm tortillas in microwave for 10 seconds.
For 1 serving: place a hot cheeseburger on one half of a warmed tortilla and top with 1 tomato slice, 1 lettuce leaf, onion rings and 3 pickle slices. Fold the tortilla in half and serve.