How to Make It
Combine first 4 ingredients. Pat pork dry with paper towels; sprinkle with salt mixture. Place pork on a rimmed baking sheet; cover and refrigerate 2 to 4 hours.
Place pork between 2 layers of plastic wrap; pound to 1/4-inch thickness using a meat mallet. Place pork in a zip-top plastic bag.
Combine juices, garlic, and 1 teaspoon pepper in a bowl; reserve 1/4 cup juice mixture. Add remaining juice mixture to pork; let stand 30 minutes.
Preheat grill to medium-high heat.
Remove pork from marinade; discard marinade. Place pork on grill rack coated with cooking spray; grill 1 minute on each side. Cover grill; grill 5 minutes.
Place pork on a platter. Drizzle reserved 1/4 cup juice mixture over pork.