Preheat grill to medium heat. 

Combine the beef, burger seasoning, and Worcestershire in a medium bowl. Gently mix with your hands until combined. 

Divide into six equal pieces.

Use your hand to form a thin and large round patty. You want them to be larger than you think but not thin enough that they break open. They will shrink and thicken while cooking. 

Fold and break your cheese slices into quarters. Pace in the center of three patties.

Take the remaining three patties and place directly on top of the cheese. Pinch the edges to close tightly.  

Grill burger patties covered for 3-5 min each side on the grill. Flip burgers when juices are accumulating on top of burger and you have a good sear.

Medium burgers will reach an internal temperature of 160 degrees.