01 - Using a small heart-shaped cookie cutter, cut out two hearts from each bread slice (12 hearts total). Repeat with cheese slices to create 12 cheese hearts.
02 - Place one cheese heart between two bread hearts to form each mini sandwich.
03 - Spread a thin layer of softened butter on the exterior surface of each assembled sandwich.
04 - Heat a nonstick skillet over medium heat. Place sandwiches buttered side down and cook for 2–3 minutes until golden brown. Flip and cook the other side for 2–3 minutes until cheese is melted and bread is crisp.
05 - Serve warm while cheese is melted and bread is crispy.