Place chocolate chips in a microwave-safe bowl and microwave 30 seconds Stir and heat 30 seconds more Repeat stirring and heating until chocolate is just melted Set aside
Combine tofu and maple syrup in food processor Blend 3 minutes or until smooth
Add peanut butter and process until smooth
Add melted chocolate and process until smooth
Pour mixture into prepared pie crust smoothing top; refrigerate 20 minutes
Sprinkle chopped pretzels on top and serve or refrigerate until ready to serve
