In the meantime, heat a good non-stick pan over medium-low. Place the heart-shaped cookie cutter on the pan and sprinkle in 1/4 cup of the grated cheese, filling up the heart space. Once the cheese starts to melt and brown, remove the cookie cutter. Cook the cheese for about a minute. Flip and cook 1 more minute, until crisp. Remove from pan and set aside. Repeat 3 more times.