1Line cookie sheet with waxed paper, foil or cooking parchment paper. Place candy coating in 8-cup microwavable measuring cup or 2-quart microwavable casserole. Microwave uncovered on High 2 to 3 minutes, stirring every 30 seconds, until almost melted. Stir until smooth.
2Place peppermint candies in heavy plastic bag; crush with rolling pin or bottom of small heavy saucepan. Pour crushed candies into wire strainer. Shake strainer over melted coating until all of the tiniest candy pieces fall into the coating; reserve the larger candy pieces. Stir coating to mix evenly.
3On cookie sheet, spread coating evenly. Sprinkle evenly with remaining candy pieces. Let stand about 1 hour or until cool and hardened. Break into pieces.