Line a rimmed cookie sheet with parchment paper or waxed paper. Melt the chocolate in a double boiler over simmering water until smooth, or melt in the microwave on high for 1 minute. Stir and microwave on high for 1 minute more. If necessary microwave on high 10 seconds more, and stir until chocolate is melted and smooth. Stir in pretzel pieces and peanuts. Stir well with a spatula.
Spread onto the prepared cookie sheet, spreading the mixture out so that ingredients are evenly distributed. Allow for the chocolate to cool for several hours or refrigerate for 45 minutes, until firm. Break into pieces, like peanut brittle. Makes 8 servings.