Created by TeresaS on October 25, 2015
Step 1: Spray the grill rack with nonstick spray; prepare the grill for medium-hot fire.
Step 2: Combine the ketchup, Worcestershire sauce, vinegar, mustard, and pepper in small bowl; mix well.
Step 3: Brush the potato slices on both sides with the ketchup mixture.
Step 4: Grill the potatoes 5 inches from heat, turning frequently and brushing with the remaining ketchup mixture, until browned on the outside and tender when pierced with a barbecue fork, about 8 minutes.