Melt the white chocolate and shortening in a double-boiler (or the microwave, if you're extremely careful not to burn!).

Pour onto a baking sheet lined with parchment paper or wax paper. Drop a few drops of red food coloring onto the chocolate, scattered around. Swirl the coloring with a fork.

Once the chocolate is starting set (you'll know because it won't be so shiny), you can take a toothpick and cut out heart shapes. They might look kind of messy, but you can clean them up once they're removed. Once dry, break up the chocolate around the hearts. Enjoy!