Minced Beef Wellington... Minced Beef Wellington   Ingredients 1 medium onion 1 carrot 1 stick of celery 1 potato 2 garlic cloves, minced 2 tablespoons olive oil 4 sprigs fresh rosemary, leaves picked and chopped 1 large egg, lightly beaten 500 g good quality minced beef salt and pepper to taste 500 g puff pastry