In a medium bowl, combine the tuna, beans, cheese, olives, onion, and cilantro. Mix well.
In a small bowl, whisk together the mayonnaise, lime juice, cumin, chili powder, salt, and pepper. Pour over the mixture in the medium bowl and stir until combined.
Lay out two tortillas on a work surface. Divide the tuna mixture evenly between them, spreading it out. Top with the remaining two tortillas.
Heat a large non-stick skillet over medium-high heat. Place one of the quesadillas in the skillet and cook until golden brown and the cheese is melted, about 3-4 minutes per side.
Repeat with the remaining quesadilla. Cut into wedges and serve immediately.
Interesting Facts
Quesadillas are a traditional Mexican dish that are usually filled with cheese.
This version of quesadillas adds protein with the addition of tuna, black beans, and cilantro.
The combination of mayonnaise, lime juice, cumin and chili powder adds a tangy flavor to the quesadillas.