Combine lemon juice, vegetable oil, onion, garlic, Worcestershire sauce, black pepper and thyme.
Pour sauce over fillets and let marinate several hours or overnight. Lightly oil grill and preheat barbecue to medium.
Place turkey fillets on grill and barbecue 8-10 minutes on each side or until juices run clear. Serve these delicious turkey fillets with our favorite grilled vegetables.