1. Preheat oven to 350 degrees Fahrenheit. Wash inside and outside of fish and pat dry. Score across fish and through skin three to four times on each side, and season with salt and pepper.
2. Slice lemon and spread on baking pan. Place seasoned fish, skin-side up, over lemon slices. Brush with olive oil and sprinkle with fresh parsley.
3. Bake for 10-15 minutes, until cooked through.