Pho Xao is a Vietnamese dish that showcases stir-fried rice noodles with a combination of ingredients like beef, chicken, or tofu, along with vegetables like bean sprouts and scallions. The noodles are cooked in a flavorful sauce made from soy sauce, fish sauce, and garlic. Pho Xao is often served with a side of fresh herbs, lime wedges, and chili sauce for added freshness and heat.