Make a double boiler by bringing a medium pot of water to simmer and placing a medium heat-safe bowl on top. Water should not touch the bottom of the bowl. Meanwhile, break or chop chocolate into small pieces. Add chocolate to bowl. Gently stir until melted using a rubber spatula. Remove from heat when fully melted.
Line a cookie sheet with parchment paper. Spoon about 2 tsp. of chocolate onto the paper, spreading it into a 2 inch round. Continue this step until all the chocolate is used. Top with desired toppings. Any combination can be used.
Once topped, transfer to refrigerator to set for 30 min. Remove from refrigerator and medallions are ready to serve. Store in airtight container with parchment between layers. Keep in a cool dry place, or in the refrigerator.