Now remember, this is your burger, so if you want a different cheese than the extra sharp Cheddar I used...GO FOR IT!!! The same with the seasonings; make it spicy, or Oriental flavor; perhaps a Southwestern flare; toppings and bread/bun are whichever ones make your taste buds dance and sing in joy.
By the way, the hamburger press I used is my old handy-dandy hamburger press and containers from Tupperware; they're 32 years old and still work as good as ever!
Cheese Stuffed Burger
2 lbs. lean (90/10) ground beef2 tsps. salt
1 tsp. ground black pepper
2 Tbsp. Worcestershire sauce
4 (1/2 inch) squares of extra sharp Cheddar cheese
In a medium bowl, mix together all ingredients except cheese. Use a ¼ cup measuring cup to portion out the mixture; make two patties using a hamburger press.
Place a square of cheese in the center of one patty; place the second patty over the first and press the sides together firmly to seal. Place onto a waxed paper lined tray, mounted side up; place into the refrigerator to firm the burgers up (minimum one hour).
Heat the grill to 350F; place burgers on grill, close lid and let cook for 5 minutes; flip burgers and repeat grilling instructions. Repeat the grilling for both sides again to get the burger cooked through to 165F (medium).