Lay out a large piece of parchment paper or foil. Place the red candy melts in a microwave safe bowl, reserving 1/3 cup of red candy melts for later.
Microwave the candy melts for 1 minute. Stir and repeat. Stir thoroughly, until the candy melts are smooth. If needed, microwave for another 30-60 seconds.
Pour the candy melts out onto the parchment paper and spread into an even layer approximately .2 inches thick. Cool completely to harden. (To speed up hardening, I put the parchment paper on a baking sheet and pop it in the fridge for 1-2 minutes while I'm preparing the next layer.)
Next mix the strawberry extract with the pink candy melts and repeat the microwave melting process. The extract will alter the consistency of the pink mixture—it will melt but not pour. Using a spatula, spread the thicker pink mixture evenly over the top of the hardened red layer. Cool to harden.
Repeat the melting process with the chocolate. Pour over the hardened pink layer and spread evenly. Before it dries, quickly sprinkle cashews, dried cherries and Valentine sprinkles over the top. Cool to harden.
Take the reserved red candy melts and melts them in the microwave. Pour them in a small zip bag and snip off a tiny portion of one corner. Squeeze the bag to drizzle the red over the top of the bark. Cool completely to harden. Once hard, cut into pieces.