From the short edge of a 450 g cheese brick, use a cheese slicer or vegetable peeler to thinly slice 16 pieces of cheese, each about 3/4 inch wide by 3-1/2 inches long.
Butter one side of bread slices. Lay 4 slices of cheese on 1 unbuttered side of bread. Top evenly with turkey and tomato slices. Top with another 4 slices of cheese and 1 slice of bread, buttered side up. Place in skillet and cook, covered for 6 to 8 minutes, until bottom slice of bread is golden and cheese has started to melt.
Flip and top with 4 slices of cheese, avocado slices and bacon. Top with remaining cheese slices and bread, buttered side up. Cook covered, until bottom is golden, about 2 to 3 minutes. Flip and cook, covered until bread is golden and cheese is melted, about 3 to 4 minutes.
For a vegetarian version, omit the cooked turkey breast and bacon and prepare as directed. You can also try this sandwich with Great Value Old Cheddar Cheese. Its sharp taste makes it another perfect match for this sandwich.