For the Dough (Crust):

1 sheet of puff pastry, thawed

1 egg (for egg wash)

1 tbsp water

For the Filling:

2 tbsp butter

1/2 onion, finely chopped

2 cloves garlic, minced

1/2 cup celery, diced

1/2 cup carrots, diced

1/2 cup mushrooms, sliced

2 tbsp all-purpose flour

1 cup seafood or fish broth

1/2 cup heavy cream

1/4 cup dry white wine (optional)

1 tsp Old Bay seasoning

1/2 tsp salt

1/4 tsp black pepper

1/4 tsp paprika

1/2 cup frozen peas

1/2 lb shrimp, peeled and deveined

1/2 lb scallops, cut into halves if large

1/2 lb white fish (such as cod or haddock), cut into chunks

2 tbsp fresh parsley, chopped

1 tbsp lemon juice