1. Mix the ground beef, salt and pepper in a large bowl and form the mixture into 8 equal-size balls. Press a cube of desired cheese into the center of each ball and cover completely with meat. Form the balls into hamburger patties, about 1/4-inch thick.
2. Grill burgers until desired doneness. Top with lettuce, tomatoes, onions and pickles as desired on a toasted bun.
3. For the Pimiento Cheese Spread: Place the drained pimientos in a blender or food processor and puree until smooth. Using an electric mixer, combine the pimientos and cheese, beating until smooth. Beat in the mayonnaise.
4. Spread the cheese spread onto the buns, add your burger and fillings and enjoy.