Heat oil and butter in a 12-inch nonstick skillet over medium heat until hot. Add fish; sauté 4 to 5 minutes per side or until fish is golden brown.
Meanwhile, combine mayonnaise, pickles, mustard and, if desired, pepper sauce. Serve fish with sauce and lemon wedges.
Nutrition information per serving:
Calories from Fat: 268
Trans fats: 0.12g