Line a 15 x 7 inch sheet pan with wax paper, or parchment paper lightly sprayed with pan coating. Set aside. In a microwave safe bowl, melt the chocolate for 30 second increments on high power until the chocolate is smooth and creamy. Add chopped pecans and pretzels coating them well. Pour the chocolate mixture onto the baking sheet and spread into a smooth layer. Chill in the fridge until the chocolate is set. Sprinkle with Maldon or sea salt. Break apart in random shapes.