Step 1

Place 4 of the tortillas on a work surface. Sprinkle one-quarter of the corn, beans, onion, cheese and chili powder evenly on each tortilla, leaving a 1/2-inch border. Top with the remaining tortillas and press down to help them stick together.

Step 2

To cook them on the stovetop: In a large skillet or grill pan over medium heat, add the olive oil and heat until shimmering (see NOTE). Add 1 quesadilla and cook for 4 to 5 minutes, then flip over and cook another 4 to 5 minutes. It's done when it begins to get brown flecks and the cheese is melted. Repeat with remaining quesadillas, adding more oil as needed.

Step 3

To bake: Position a rack in the middle of the oven and preheat 375 degrees. Place the quesadillas on a large, lightly oiled, rimmed baking sheet and bake for 5 minutes per side.

Step 4

Transfer the quesadillas to a cutting board and cut each into 4 wedges. Let them rest for a minute before serving.

Step 5

NOTE: If using a grill pan, you may want to use nonstick spray oil to coat the pan before adding the tortillas.