Start by forming the meatballs. In a large bowl, combine all the ingredients listed under "meatballs," except for the oil. Mix by hand until well combined, then shape into medium-sized balls.
Fry the meatballs in a large, hot pot with oil until cooked through. Remove them from the pot and set aside.
In the same pot, add the onions and garlic. Cook until softened, then add the cherry tomatoes and cook for a few more minutes. Pour in the chicken broth and bring to a simmer. Add the misua noodles and return the meatballs to the pot.
Lastly, peel the loofah, slice it into disks, and add it to the soup along with some fish sauce. Serve and enjoy!
