Colada morada
purple hot corn beverage from Ecuador
Food
The travel guide lists 18 places to eat and drink in Quito. Local dishes to try: Colada morada, Fritada, Fanesca, Humita, and Tostones.
Listed in the Wikivoyage travel guide. Opening hours and prices change, so check before you go.
Juan Rodriguez 282 y Reina Victoria
Joaquín Pinto E4-60
Av. González Suárez N27 142
Gral. Melchor Aymerich
Isla Isabela 44-27
Valladolid N24-438
Chile y Venezuela (Palacio Arzobispal)
Mariano Aguilera 331 & La Pradera
Av. de la República
Joaquin Pinto y Diego de Almagro
Corner of Diego de Almagro y Joaquin Pinto, La Mariscal
Jose Calama y Diego de Almagro
Source and corrections: Wikivoyage guide to Quito · CC BY-SA 4.0
Foods and drinks that come from Ecuador, the most widely known first.
purple hot corn beverage from Ecuador

Peruvian, argentinian and uruguaya sauce
Typical food from Colombia, Costa Rica, Ecuador and Mexico

Ecuador is known for Colada morada, Fritada, Fanesca, Humita, and Tostones.
The travel guide to Quito lists Achiote, El Maple, Restaurant Techo del Mundo, Pim's, and Salnés.
Sources: Wikidata (CC0), Wikivoyage (CC BY-SA 4.0), photos from Wikimedia Commons.