What foods are eaten during Tet?

As a curious observer of cultural traditions, I'm fascinated by the unique customs surrounding Tet, the Vietnamese Lunar New Year. Could you elaborate on the types of foods that are typically consumed during this festive celebration? Do specific dishes hold deeper symbolic meanings, representing prosperity, luck, or other good omens for the year ahead? Furthermore, I'm intrigued by how these dishes are prepared and the rituals associated with their consumption. Could you provide some insight into the culinary significance of Tet and the role food plays in this significant holiday?