1.Make green olive and tomato relish. Heat oil in medium saucepan; cook onion and garlic, stirring, until onion softens. Add tomato, olives, sugar and vinegar; cook, stirring occasionally, 10 minutes. Remove from heat; stir in capers and parsley.
2.Meanwhile, cut potatoes into 1cm slices; cook in heated oiled grill pan, uncovered, until tender.
3.Sprinkle turkey with salt and pepper; cook in same grill pan until cooked through. Serve with potato and relish.