The main ingredient in traditional Vietnamese pho is rice noodles, specifically flat rice vermicelli known as "bánh phở." Pho is a popular Vietnamese dish that consists of broth, herbs, and meat, which is commonly beef (pho bò) or chicken (pho gà). The broth is usually simmered for hours with spices such as star anise, cloves, and cinnamon to develop a rich flavor. The dish is typically served with fresh herbs, lime, and bean sprouts on the side, allowing diners to customize their bowl. Pho has become popular worldwide for its fragrant aroma and warm, comforting qualities.