Rub fish with olive oil and season with salt and pepper. Melt butter in large, oven-safe skillet over medium heat. Add fish and sauté on one side until lightly browned. Flip fish over and sauté 2 – 3 minutes more. Combine remaining ingredients except cheese in a bowl and spoon equally over fish. Put cheese over artichoke mixture and place skillet in a preheated 400 degree oven until cheese is melted. Serve immediately.