In a medium bowl, microwave the chocolate in 30 second increments and stir between each until melted. Stir in the crushed pretzels and candy canes.
Pour the chocolate mix over evenly over the parchment paper. Sprinkle some sea salt over the chocolate and let sit at room temperature for a few hours until hard. Once hard, break into pieces.
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Notes
The easiest way to melt chocolate is in the microwave where you warm the chocolate in 30-second intervals and stir after each one until the chocolate is melted. You don't want to overdo it though.
If you don't have a microwave, melt the chocolate in a double boiler by placing a large heat-proof bowl over a pot of gintely simmering water and cooking until the chocolate is melted, stirring frequently.
Spread the chocolate to about ¼ inch thickness which makes for great bark.
If you don't have time, place the bark in the freezer for 30 minutes before breaking up.