Line a large baking tray with parchment paper or silicone baking mat. Set aside.
Break chocolate bars into pieces and place into heatproof bowl. Using a double broiler* set up, melt the chocolate pieces until smooth. (Alternatively you can microwave the chocolate in 30-second intervals until smooth and completely melted.)
Use a spoon to scoop and drop melted chocolate into small rounds onto the parchment paper. By tilting the spoon steadily, the chocolate will form a natural circle. I used a large spoon to create ~2 inch wide mendiants.
Sprinkle each chocolate circle with toppings of your choice. Work quickly as the chocolate needs to be melted in order for the toppings to set.
Place the mendiants into the fridge to set faster. Once the chocolate hardens, the mendiants are set!