These are absolutely melt in your mouth delicious! You can make them on the grill or in the oven. Even friends of ours that don't care for onions loved these! I would recommend that you use 1 large onion for every 2 people. Some people want one whole onion to themselves so you might want to make some extra! They are also good heated up the next day but we rarely have any extra!
The key to the Vietnamese noodle soup pho is in the broth. Beef bones, onions, star anise, ginger, and fish sauce get simmered for 6 to 10 hours to create a rich and flavorful base for this hearty and comforting soup.