1. Combine cornmeal and garlic in a shallow dish.
2. Brush fillets with milk; sprinkle with seasoning. Dredge fillets in cornmeal mixture, pressing gently to coat.
3. Heat a large skillet over medium heat; coat pan with cooking spray. Add 1 teaspoon oil. Add 2 fillets to pan, and cook 5 to 6 minutes on each side or until fish flakes easily when tested with a fork. Remove fillets from pan; set aside, and keep warm.
4. Wipe drippings from pan with a paper towel. Repeat procedure with cooking spray, remaining 1 teaspoon oil, and 2 fillets. Serve with tartar sauce.