Cut four slices of Armstrong Mexican Fiesta Marble Jalapeno Cheese into squares, equaling 16 squares.
Combine ground beef with Worcestershire sauce. Divide into four balls. Take each ball of meat and create two discs, one being slightly larger than the other. Place larger beef disc on your work surface. Top with four cheese squares (evenly in the middle) and top with smaller disc. Pinch bottom layer of meat with top, creating a seal. Repeat for remainder of meat. You should now have 4 patties total. Season each with salt and pepper.
Grill on high heat for 3-4 minutes per side, or until an internal temperature of 140-145 degrees Fahrenheit is reached.
Add remaining 4 cheese slices when there is 1 minute left of cooking time.
Assemble burgers: add a layer of lettuce on the bottom prior to adding your patty. Top with patty, guacamole, tomatoes and red onions. Add condiments as desired.
