French Dip Roast Beef Pinwheels - Pizzazzerie

Ingredients

• 4 thin slices Roast Beef
• 1 sheet puff pastry (thawed)
• 1 yellow onion (thinly sliced)
• 2 tbsp butter
• 1/2 tsp salt
• 4 slices provolone cheese
• 1 egg (beaten (for egg wash))
• 1 tbsp fresh rosemary (finely chopped)
• 1 1/2 cups beef stock
• 1 tbsp Worcestershire sauce
• 1/2 tsp garlic powder
• 1/2 tsp onion powder