Mashed potatoes get a savory upgrade here — folded with sweet sautéed leeks, briny capers, and a sharp chili cheese, then baked inside a golden puff pastry shell. It’s comfort food with a little backbone: the filling is rich with butter, but the leeks bring a gentle sweetness and the capers cut through with bursts of salt and acidity.
It comes together more easily than it looks — boil and mash the potatoes, soften the leeks in butter, fold everything together, then wrap it in a sheet of store-bought puff pastry and bake until the crust is deep gold and crisp. Serve it as a vegetarian main with a sharp green salad, or as a side alongside roast chicken or pork.
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Buttery Mashed Potatoes and Leeks in Puff Pastry Pie
- Total Time: 55 minutes
- Yield: 4 servings 1x
- Diet: Vegetarian
Description
A simple yet elegant tart featuring creamy potato and leek puree spread over flaky puff pastry. Salty capers and spicy cheese provide a delightful contrast in every bite.
Ingredients
- 1 kg (2.2 lbs) potatoes
- 2 leeks
- salt and pepper to taste
- 60 g (2.1 oz / 4 tablespoons) butter
- 100 g (3.5 oz / 1/2 cup) capers
- 1 tablespoon freshly grated pepper
- 70 g (2.5 oz) cheese with chili (or other hard cheese)
- 1 sheet (or about one 14 ounce / 397 g package puff pastry)
Instructions
- Peel the potatoes and let them cook with the leeks (washed and cut).
- Once cooked, mash the potatoes and season with butter, salt, and pepper to taste.
- Add the capers and freshly grated pepper and mix.
- Roll out the puff pastry on a baking sheet greased or covered with parchment paper.
- Cover the pastry with the mashed potato mixture and top with the diced cheese.
- Bake in a preheated oven for 20 minutes at 180°C (350°F).
Notes
- Ensure the potatoes are cooked until very tender before mashing for a smooth puree.
- Make sure to thoroughly drain the potatoes after cooking to avoid a watery puree that could make the puff pastry soggy.
- Bake the puff pastry until golden brown to ensure it is fully cooked and flaky.
- Prep Time: 20 minutes
- Cook Time: 35 minutes
- Category: Main Course
- Method: Baking
- Cuisine: Italian-Inspired
Nutrition
- Serving Size: 1/4 of the tart
- Calories: 500
- Sugar: 4
- Sodium: 650
- Fat: 30
- Saturated Fat: 15
- Unsaturated Fat: 15
- Trans Fat: 1
- Carbohydrates: 45
- Fiber: 5
- Protein: 12
- Cholesterol: 50
Frequently Asked Questions
What type of cheese can I use for the Buttery Mashed Potatoes and Leeks in Puff Pastry Pie?
You can use a variety of fine cheeses such as mozzarella, fontina, or even a sharp cheddar to enhance the flavor of the dish. 
How do I prepare the leeks for this pie?
Wash the leeks thoroughly to remove any grit, then slice them thinly before sautéing until they are tender to incorporate into the mashed potatoes.
Can I replace the puff pastry with a different crust?
Yes, you can use a shortcrust pastry or even phyllo dough as an alternative, though the texture and flavor may vary.
