For those following a vegetarian diet, this sweet and sour chicken recipe is a great meat-free alternative. Instead of chicken, this version uses tofu as the protein source. The tofu is marinated in a mixture of soy sauce, garlic, and ginger, which adds flavor and helps to firm up the tofu. After marinating, the tofu is coated in a light batter and fried until crispy. The sauce is made with vinegar, ketchup, sugar, and soy sauce, just like the traditional version. This vegetarian sweet and sour chicken is a delicious and satisfying dish that even meat lovers will enjoy.