Cheesy fish pot pie

Directions

1. In large pot bring potatoes and water to the boil, add big pinch salt to water, cook until soft (about 15 minutes). Pre-heat oven to 375 degrees F.
2. While the potatoes are cooking, use a  12x9 inch baking pan at least 2 inches deep.
3. Using cheese grater, shred onion, carrots, celery and cheese place into pan. Add cubed fish, thyme, peas, lemon zest and juice. Add pinch Mrs. Dash or salt and pepper. Mix well and spread evenly in pan. Drain potatoes and mash, season with pinch Mrs.Dash or salt and pepper, add butter, mix well then spread potatoes on top of fish & veggie mixture evenly.
4. Drizzle top of potatoes with a bit more olive oil. Bake uncovered for 45 minutes or until golden and bubbly, then broil on high five minutes for a crunchy brown topping.
5. If using pie shell crust instead of potatoes, reshape the shell to fit the top of the fish mixture. Coat top of pie shell with one beaten egg for a golden brown crust.
6. Garnish fish pie with dollop of garlic dill sour cream (optional)