Line a small tray with parchment or grease proof paper.
Chop the chocolate into small pieces and place it in a bowl.
Melt the chocolate either in the microwave oven for 30 seconds or use the double boiler method.
Using a silicon spatula, spread the melted chocolate over the parchment or grease proof paper.Don't make it too thin or too thick. About ¼" thickness is the best.
Immediately sprinkle the toppings over the melted chocolate.
Using a clean spatula or fork, gently press down the topping so that it sticks to the chocolate.
Let the chocolate set at room temperature till it becomes hard. This will depend on the weather.
Break the bark into pieces.
Store in an airtight container in a cool place.
Notes
Make sure the chocolate has melted properly, otherwise it may not harden.
Use good quality chocolate. Usually chocolate drops are not such a good idea unless they are of good quality.
Do not add any shortening, butter, oil, milk to the melted chocolate as these ingredients will prevent it from setting.
Make sure everything is ready before you melt and spread the chocolate.