1 sheet puff pastry (25cm x 25cm),thawed,cut into 4 equal squares

1 egg yolk,beaten

2 tbsp unsalted butter

1 brown onion,diced

2 garlic cloves,finely diced

100g streaky bacon,chopped into 1cm squares

500g chicken thigh fillets,cut into small bite-size pieces (about 2cm)

2 small carrots,peeled,cut in 4 lengthways then chopped 7mm thick

2 celery ribs,cut in 4 lengthways then chopped 7mm thick

1 tsp dried thyme

¼ cup marsala wine (optional,see note)

2 cups broccoli florets,cut small (150g)

1 cup frozen peas

3 tbsp plain flour

2 cups full cream milk,hot

½ tsp cooking salt

¼ tsp black pepper