Rinse strawberries and allow them to dry outside the refrigerator. When you start dipping, you want the strawberries to be dry and at room temperature.
To melt the chocolate, use a dry bowl and dry spoon. Break the chocolate into pieces and microwave for 30 seconds on a medium setting. Remove from microwave and stir gently.
Return to microwave for 30 seconds on a medium setting. Remove from microwave and stir gently. Continue until chocolate is mostly melted. You want to heat the chocolate slowly, so don't use a higher setting or longer cook time, even if at first there appears to be little progress. Heat for 30 seconds at time on a medium setting, and stir gently. When only small pieces remain, stir gently and allow the warm chocolate to melt the remaining pieces.
Dip strawberries one at time in chocolate. Hold the strawberries by the green leaves and dip the fruit in the chocolate. Place each piece on a cookie sheet lined with parchment paper.
If you are using sprinkles, immediately sprinkle each strawberry. If you have heavy sprinkles, like the mickey mouse sprinkles shown in the photo below, and if your chocolate is very liquid, you may want to wait a few seconds for the chocolate to cool slightly so the sprinkles don't slide, but in most cases you will want to sprinkle right away.
If not using sprinkles, if you would like, use a fork and some contrasting chocolate to drizzle the strawberries.
Allow to cool. It's best to cool the chocolate slowly rather than cooling it in the refrigerator. It's OK to refrigerate after the chocolate has cooled.
Strawberries with drizzles
Strawberries with sprinkles
Strawberry with green sprinkles
Strawberries with Mickey sprinkles