Prepare the griddle. Heat up a flat top griddle or large skillet to medium high heat.
Prepare the burgers. Divide the ground beef into 8 equal portions. Place on heated griddle. Press down and spread out into a thin layer. Season with salt and pepper or your favorite seasonings.
Cook the burgers. Cook for 2-3 minutes until the beef is cooked through and browned. Flip and repeat on other side. Add slice of cheese to each patty for about seconds till melted. Remove from grill on a plate and set aside.
Assemble the big mac crunchwrap. Place a large tortilla on a large plate and assemble the big mac crunchwrap in the middle in the following order; big mac sauce, patty with cheese, tostada, big mac sauce, lettuce, onions, pickles, sesame seeds (optional) and a small tortilla. Tightly fold the edges of the tortilla towards the middle creating pleats. Repeat with the rest of the crunchwraps.
Grill the crunchwrap. Brush the flat top griddle with oil and reduce heat to medium. Place the crunchwraps on the griddle folded side down and cook for about 2 minutes or until golden brown. Flip over and repeat on the other side. Serve hot, dip in Big Mac sauce and enjoy!