Cozy Up with My Delicious Fish Pie with Veggies: Bake in 1…

Ingredients

• 1 pound (450g) white fish fillets (such as cod or haddock)
• 1 cup (150g) frozen peas
• 1 medium carrot, diced (about 1/2 cup or 75g)
• 1 cup (150g) diced potatoes
• 2 tablespoons (30g) unsalted butter
• 2 tablespoons (15g) all-purpose flour
• 1 cup (240ml) milk
• 1 teaspoon Dijon mustard
• Salt and pepper to taste
• 1 package (14 oz or 400g) puff pastry, thawed
• 1 egg, beaten (for egg wash)