In a large skillet, heat 1 tablespoon of olive oil over medium heat. Once hot, add the diced red onion and sauté for 3-4 minutes, or until it becomes translucent.
Add the minced garlic, diced bell pepper, and zucchini to the skillet. Continue sautéing for an additional 5 minutes, stirring occasionally, until all vegetables are tender and vibrant.
Incorporate the corn and rinsed black beans into the skillet. Sprinkle in the cumin, chili powder, and season with salt and black pepper. Stir well to combine and cook for an extra 2-3 minutes until everything is heated through. Remove the skillet from heat.
Prepare the quesadillas: On one half of each tortilla, evenly sprinkle a layer of shredded cheese. Then, spoon a generous amount of the sautéed veggie mixture over the cheese. Finish with another sprinkle of cheese on top before folding the tortilla in half.
In a second skillet, heat the remaining tablespoon of olive oil over medium heat. Carefully place one folded quesadilla in the skillet. Cook for about 3-4 minutes on each side, or until the tortilla is golden brown and crispy. Remove from the skillet and repeat this process with the remaining tortillas.
Once all quesadillas are cooked, allow them to cool for a minute. Use a sharp knife to cut each quesadilla into wedges for easy serving.
Garnish with freshly chopped cilantro and present with a side of salsa and sour cream for dipping.
Notes
Arrange the quesadilla wedges on a platter and sprinkle extra cilantro over the top. Serve with small bowls of salsa and sour cream at each end to encourage sharing.