Homemade Hot & Sour Soup

J almost always gets hot and sour soup when we place a home-delivery order from a Chinese restaurant in the town. I remembered it when I saw four ingredients in hand - smoked Tofu, carrots, mushrooms, and an egg. Why should I make hot and sour soup at home? The recipe was basically the same as my usual simple egg drip soup. The result was pretty good! It wasn't hot enough for J but it was fine with me. I would add a bit more vinegar next time.