Chop potatoes in half (this cooks them faster). Place in in small to medium sauce pan with enough water to cover top of potatoes. Place on high heat, bring to a boil, and let boil for 5-10 minutes. Add salt and pepper to water.
While potatoes are cooking: Shred carrots. Set aside. Place fish on cutting board to season, add salt and pepper, garlic pepper, lemon juice, and parsley. Do this to both side.
Heat skillet to medium heat, add butter, once heated place fish fillet in skillet, cook on medium for 2 minutes on both sides, then again for 1-2 minutes on each side. Add an extra squirt of lemon juice while cooking.
Remove potatoes into medium sized mixing bowl, add butter, mash and whisk the potatoes. Add salt and pepper to taste.
Place mashed potatoes on your plate and place the fish fillet directly on top of the potatoes, add your shredded carrots. Serve warm. Enjoy!