Gordon Ramsay's Beef Wellington Recipe | Impress Like a Pro

Ingredients

• 1-2 lbs beef tenderloin
• 2 tbsp olive oil
• Salt and pepper
• 1 tbsp butter
• 1 small onion, finely chopped
• 8 oz cremini mushrooms, finely chopped
• 1 tbsp Worcestershire sauce
• 1 tbsp Dijon mustard
• 1 sheet puff pastry, thawed
• 1 egg, beaten