Best Ever Beef Wellington Recipe

Ingredients

• 3 Tablespoons yellow mustard
• 2 Tablespoons olive oil
• 1 pound mushrooms
• 2 eggs
• 1/4 cup onion
• 6-8 slices prosciutto
• 1 sheet puff pastry
• 3 cloves garlic
• salt and pepper
• 2-3 pound beef tenderloin