For 10 points, name this character who tilts at windmills in a novel by Miguel de Cervantes.
Cardenio is continually interrupted by this character while explaining his love for Lucinda. This character's exploits are chronicled by the made-up author Cide Hamete Benengeli. He steals a washbasin from a barber after mistaking it for the Helmet of Mambrino, and is defeated by the Knight of the White Moon. This character, who rides the horse Rocinante, goes on a quest to find the princess Dulcinea with his squire Sancho Panza. For 10 points, name this character who tilts at windmills in a novel by Miguel de Cervantes.
Cardenio is continually interrupted by this character while explaining his love for Lucinda.
Don Quixote [or El Quijote]