In food processor fitted with metal blade, process beans, red onion,
cilantro, parsley and salsa until smooth.
Place half of tortillas on work surface and spread with bean mixture.
Top each with cheeses. Top each with tortilla.
Heat about 2 teaspoons vegetable oil in medium-large skillet, preferably
nonstick, over medium-high heat. Add one quesadilla. Cook until
beans are heated and bottom tortilla is browned, about 3 to 4 minutes.
Carefully turn to brown opposite side. Repeat with remaining quesadillas,
adding more oil when necessary.