Chicken Pot Pie recipes

Name: Chicken Pot Pie recipes
Ingredients: 75g butter; 1 large onion, peeled and thinly sliced into half moons; 1 head of broccoli, broken into florets (about 300g); 2 tbsp plain flour, plus extra for dusting; 350ml hot chicken stock; sea salt; freshly ground black pepper; 1 heaped tsp English mustard; 150ml single cream; 400g cooked chicken, torn into bite-sized pieces; 1 large egg, beaten; 250g plain flour; 170g very cold, butter, cut into small cubes; 1 tsp sea salt; 1 egg; 1 tbsp balsamic vinegar; 2 tbsp ice cold water