Vegetarian Potato and Pea Pie

Ingredients:

• 200 g ready-made puff pastry or shortcrust pie base, defrosted
• 1 tbsp (15 g) butter
• 2 small fennel roots, finely chopped (about 3 cups)
• Half a medium onion, finely chopped
• 2 medium carrots, peeled and finely chopped (about 2/3 cup)
• 350 g mushrooms, sliced ​​(about 5 cups)
• 1 small Russet Burbank potato, peeled and finely diced (about 2 1/2 cups)
• 1/4 cup flour
• 1 tbsp. lightly salted mushroom broth
• 1 cup whole milk
• 1 cup frozen green peas
• 1/4 cup thinly sliced ​​fresh chives
• 1/4 cup parsley
• 1 tbsp. white vinegar
• 1 large egg yolk

Preparation:

1. Preheat oven to 200°C and position the rack on the middle shelf.
2. In a heavy-bottomed saucepan or cast-iron 3-4-quart Dutch oven, melt the butter over medium heat. Once foaming, add the fennel, onion, and carrots and cook until the onions are soft and translucent, about 2 minutes.
   
   Add the mushrooms and potatoes, season generously with salt and pepper, and stir. Cook, stirring occasionally, until the mushrooms release their juices and begin to shrivel, about 6 minutes.
3. Sprinkle the vegetables with flour, stir, and cook until the raw taste disappears, about 1-2 minutes. Carefully pour in the broth and milk, stirring constantly until the mixture is smooth. Bring to a simmer over medium heat and cook until slightly thickened, about 5 minutes.
4. Remove from heat, add peas, herbs, and vinegar, and stir. Season generously with salt and pepper. Spread the filling in a 20x20 cm baking dish.
5. Beat the egg with 2 teaspoons of water and a pinch of salt.
   
   Using kitchen scissors, cut the dough to fit the baking dish. Spread the dough over the filling and tuck the edges in. Brush the dough with egg wash and cut vents to allow steam to escape.
6. Place the pan on a baking sheet and bake until golden brown and the mixture begins to bubble, about 25-30 minutes. Let stand for at least 5 minutes before serving.
   
   
   For this dish, choose a soft wine; aging in a Vosges oak barrel improves the taste and aroma of the wine, for example, Chardonnay..