Scottish Steak and Sausage Pie

Name: Scottish Steak and Sausage Pie
Prep time: 20 min
Cook time: 1 h
Total time: 1 h 20 min
Cuisine: British
Ingredients: 1 tbsp vegetable oil; 1 large onion (finely chopped); 1 lb beef stew meat or braising steak (chuck, skirt, flan) (chopped big bite size bits); 0.5 lb link beef sausages (cut into three pieces); 3 tbsp plain flour; 1/2 cup beef stock (use 1 cube); 1 cup water; 1 tsp Worcestershire sauce (optional); 1 sheet frozen puff pastry (thawed); salt and pepper (to taste)