Equipment
* optional
Ingredients
Mashed Potato Topping
- 800 g floury potatoes, peeled and cubed
- 100 g unsalted butter, cubed and softened
- 80 ml heavy cream, warmed
- 2 egg yolks, beaten
- kosher salt
Vegetable Base
- 60 g unsalted butter
- 150 g leeks, white and light green parts only, washed and sliced
- 100 g celery, finely diced
- 100 g carrots, finely diced
- 2 garlic, minced
Creamy Seafood Sauce
- 50 g all-purpose flour
- 60 ml dry white wine
- 300 ml seafood stock, warmed
- 150 ml heavy cream
- 10 g dijon mustard
Lobster and Finishings
- 400 g cooked lobster meat, roughly chopped into bite-sized pieces
- 100 g frozen peas
- 10 g fresh tarragon, finely chopped
- 15 ml lemon juice, freshly squeezed
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 569 kcal
- Protein
- 22 g
- Carbohydrates
- 34 g
- Fat
- 39 g
- Fiber
- 6 g
- Sugar
- 4 g
- Sodium
- 823 mg
- Saturated Fat
- 23 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 11 g
- Polyunsaturated Fat
- 2 g
- Cholesterol
- 263 mg
- Potassium
- 1068 mg
- Calcium
- 200 mg
- Iron
- 6.3 mg
- Magnesium
- 91 mg
- Phosphorus
- 301 mg
- Zinc
- 3.8 mg
- Vitamin A
- 549 mcg
- Vitamin C
- 25 mg
- Vitamin D
- 0.9 mcg
- Vitamin E
- 2.3 mg
- Vitamin K
- 27 mcg
- Vitamin B6
- 0.6 mg
- Vitamin B12
- 1.5 mcg
- Thiamin
- 0.17 mg
- Riboflavin
- 0.27 mg
- Niacin
- 4.0 mg
- Folate
- 79 mcg
- Water
- 320 g
- Alcohol
- 1 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Place the cubed potatoes in a large saucepan and cover with cold, generously salted water. Bring to a boil over high heat, then reduce to a medium simmer. Cook until fork-tender.
Drain the potatoes thoroughly and return them to the warm saucepan off the heat for 2 minutes to let excess moisture evaporate. Mash or rice the potatoes, then vigorously fold in the softened butter, warmed heavy cream, and egg yolks until entirely smooth. Season to taste with salt.
Melt the butter for the vegetable base in a large skillet over medium heat. Add the sliced leeks, diced carrots, and diced celery. Sauté gently until the vegetables are softened and translucent but not browned.
Add the minced garlic and cook for an additional minute until aromatic. Sprinkle the flour over the vegetable mixture and stir continuously to cook the raw flour. The mixture will resemble a thick paste.
Pour in the dry white wine to deglaze the pan, scraping the bottom to release any stuck bits. Let the wine reduce until almost fully evaporated.
Gradually whisk in the warmed seafood stock, followed by the heavy cream and Dijon mustard. Bring the mixture to a gentle simmer and cook until the sauce is rich and thick enough to coat the back of a spoon.
Remove the skillet from the heat. Gently fold in the cooked lobster meat, frozen peas, chopped fresh tarragon, and lemon juice. Taste and adjust seasoning with salt and pepper if necessary. Be mindful to keep cooked lobster chilled until it is added, mitigating bacterial growth risks.
Preheat your oven to 200 C (400 F). Transfer the lobster filling into a 2-quart baking dish, spreading it into an even layer. Spoon or pipe the mashed potatoes over the top, making sure to seal the edges against the dish to prevent the sauce from bubbling over. Score the surface with a fork to create ridges.
Bake in the preheated oven at 200 C (400 F) until the sauce bubbles vigorously around the edges and the potato crust develops a deep golden-brown color. The internal temperature of the filling should reach 74 C (165 F).
Remove the pie from the oven and allow it to rest at room temperature. This resting period allows the filling to settle and thicken slightly, making it much easier to serve clean portions.
Chef's Notes
- Drying the boiled potatoes thoroughly in the hot pot before mashing ensures they absorb the butter and cream without becoming watery or gluey.
- Egg yolks in the potato mash act as an enriching agent, providing a structurally sound crust that holds beautiful definition and browns exquisitely in the oven.
- When folding in the lobster, handle it very gently to keep the chunks intact. Large, meaty pieces provide the luxurious texture expected of a premium dish.
- Tarragon has a strong anise profile that pairs perfectly with shellfish. If you are sensitive to the flavor, use chives or flat-leaf parsley as a milder substitute.
Storage
Refrigerator: 3 days — Store in an airtight container. Seafood quality degrades quickly, so consume promptly.
Freezer: 1 month — Freeze unbaked for best results. Freeze solid, then wrap tightly.
Reheating: Reheat in a 175 C (350 F) oven for 20-30 minutes until bubbling and heated through to an internal temperature of 74 C (165 F).
Troubleshooting
Mashed potatoes sink into the filling during baking
Cause: The filling was too thin or the potatoes were applied too heavily at once
Fix: Cannot be fixed once baked, but the dish will still be delicious. Next time, let the filling cool slightly before topping.
Prevention: Ensure the sauce is properly reduced before assembling, and pipe or spoon the potatoes gently starting from the outer edges to seal the dish first
Lobster meat is rubbery and tough
Cause: The lobster was overcooked either prior to assembling or by lingering too long in the hot sauce before baking
Fix: Cannot be fixed
Prevention: Only fold the cooked lobster into the sauce off the heat just before assembling and baking. Do not let it simmer on the stove.
Sauce splits or looks greasy
Cause: The sauce was boiled too rapidly after the heavy cream was added
Fix: Whisk vigorously off the heat with a splash of cold water or cold cream before adding the lobster
Prevention: Maintain a gentle simmer when reducing the cream sauce, avoiding rolling boils
Cultural Context
While Shepherd's Pie traditionally utilizes minced lamb and Cottage Pie relies on beef, the framework of a rich stew crowned with mashed potatoes has inspired countless variations. The Fisherman's Pie or Fish Pie is a beloved British coastal staple, historically utilizing smoked haddock and cod in a parsley sauce. Elevating it with lobster meat transforms a rustic tavern staple into a refined centerpiece worthy of celebratory winter dinners.
